Initial commit of publishing flutter artifacts to the artifact registry and signing it through cosign.

* Adds install cosign method, which takes the latest version of cosign from CIPD
* Adds an UploadAndSignFlutterPackage method, which both uplaods flutter to the artifact registry, then signs it.

Bug: b/230772081

Change-Id: I386ba0e3a021e2cfc877804cc3e669db63a8a9db
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/30202
Commit-Queue: Drew Roen <drewroen@google.com>
Reviewed-by: Christopher Fujino <fujino@google.com>
diff --git a/recipe_modules/flutter_deps/api.py b/recipe_modules/flutter_deps/api.py
index ee0d3ba..f28e5b6 100644
--- a/recipe_modules/flutter_deps/api.py
+++ b/recipe_modules/flutter_deps/api.py
@@ -60,6 +60,7 @@
         'chrome_and_driver': self.chrome_and_driver,
         'clang': self.clang,
         'cmake': self.cmake,
+        'cosign': self.cosign,
         'curl': self.curl,
         'dart_sdk': self.dart_sdk,
         'dashing': self.dashing,
@@ -390,6 +391,23 @@
     paths.append(cmake_path.join('bin'))
     env_prefixes['PATH'] = paths
 
+  def cosign(self, env, env_prefixes, version=None):
+    """Installs cosign.
+
+    Args:
+      env(dict): Current environment variables.
+      env_prefixes(dict): Current environment prefixes variables.
+    """
+    version = version or 'latest'
+    cosign_path = self.m.path['cache'].join('cosign')
+    cosign = self.m.cipd.EnsureFile()
+    cosign.add_package('flutter/tools/cosign/${platform}', version)
+    with self.m.step.nest('Install cosign'):
+      self.m.cipd.ensure(cosign_path, cosign)
+    paths = env_prefixes.get('PATH', [])
+    paths.append(cosign_path.join('bin'))
+    env_prefixes['PATH'] = paths
+
   def ninja(self, env, env_prefixes, version=None):
     """Installs ninja.
 
diff --git a/recipe_modules/flutter_deps/examples/full.expected/basic.json b/recipe_modules/flutter_deps/examples/full.expected/basic.json
index 7243bf2..f29aa1c 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/basic.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/basic.json
@@ -401,6 +401,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -638,6 +671,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.expected/flutter_engine.json b/recipe_modules/flutter_deps/examples/full.expected/flutter_engine.json
index 22a543e..6720125 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/flutter_engine.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/flutter_engine.json
@@ -485,6 +485,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -724,6 +757,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.expected/goldTryjob.json b/recipe_modules/flutter_deps/examples/full.expected/goldTryjob.json
index 7243bf2..f29aa1c 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/goldTryjob.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/goldTryjob.json
@@ -401,6 +401,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -638,6 +671,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.expected/linux.json b/recipe_modules/flutter_deps/examples/full.expected/linux.json
index 7243bf2..f29aa1c 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/linux.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/linux.json
@@ -401,6 +401,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -638,6 +671,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.expected/local_engine_cas.json b/recipe_modules/flutter_deps/examples/full.expected/local_engine_cas.json
index 00e4787..7c7baf9 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/local_engine_cas.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/local_engine_cas.json
@@ -485,6 +485,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -724,6 +757,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.expected/mac.json b/recipe_modules/flutter_deps/examples/full.expected/mac.json
index 296f030..57542a0 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/mac.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/mac.json
@@ -463,6 +463,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
diff --git a/recipe_modules/flutter_deps/examples/full.expected/windows.json b/recipe_modules/flutter_deps/examples/full.expected/windows.json
index 424ee1a..2af807e 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/windows.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/windows.json
@@ -401,6 +401,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -605,6 +638,7 @@
         "[CLEANUP]\\tmp_tmp_1\\vpython",
         "[START_DIR]\\firebase",
         "[CACHE]\\cmake\\bin",
+        "[CACHE]\\cosign\\bin",
         "[CACHE]\\ninja",
         "[CACHE]\\clang\\bin",
         "[CLEANUP]\\tmp_tmp_2\\curl"
@@ -678,6 +712,7 @@
         "[CLEANUP]\\tmp_tmp_1\\vpython",
         "[START_DIR]\\firebase",
         "[CACHE]\\cmake\\bin",
+        "[CACHE]\\cosign\\bin",
         "[CACHE]\\ninja",
         "[CACHE]\\clang\\bin",
         "[CLEANUP]\\tmp_tmp_2\\curl"
diff --git a/recipe_modules/flutter_deps/examples/full.expected/with-arm64ruby.json b/recipe_modules/flutter_deps/examples/full.expected/with-arm64ruby.json
index 95e96a4..2be75bd 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/with-arm64ruby.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/with-arm64ruby.json
@@ -401,6 +401,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -638,6 +671,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.expected/with-gems.json b/recipe_modules/flutter_deps/examples/full.expected/with-gems.json
index f0b92c0..4696f31 100644
--- a/recipe_modules/flutter_deps/examples/full.expected/with-gems.json
+++ b/recipe_modules/flutter_deps/examples/full.expected/with-gems.json
@@ -401,6 +401,39 @@
   },
   {
     "cmd": [],
+    "name": "Install cosign"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/cosign",
+      "-ensure-file",
+      "flutter/tools/cosign/${platform} latest",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "name": "Install cosign.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-latest----------\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter/tools/cosign/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
     "name": "Install ninja"
   },
   {
@@ -638,6 +671,7 @@
         "[CLEANUP]/tmp_tmp_1/vpython",
         "[START_DIR]/firebase",
         "[CACHE]/cmake/bin",
+        "[CACHE]/cosign/bin",
         "[CACHE]/ninja",
         "[CACHE]/clang/bin",
         "[CLEANUP]/tmp_tmp_2/curl",
diff --git a/recipe_modules/flutter_deps/examples/full.py b/recipe_modules/flutter_deps/examples/full.py
index 4ff2418..8050472 100644
--- a/recipe_modules/flutter_deps/examples/full.py
+++ b/recipe_modules/flutter_deps/examples/full.py
@@ -54,6 +54,7 @@
   api.flutter_deps.flutter_engine(env, env_prefixes)
   api.flutter_deps.firebase(env, env_prefixes)
   api.flutter_deps.cmake(env, env_prefixes)
+  api.flutter_deps.cosign(env, env_prefixes)
   api.flutter_deps.ninja(env, env_prefixes)
   api.flutter_deps.clang(env, env_prefixes)
   api.flutter_deps.apple_signing(env, env_prefixes)
diff --git a/recipes/packaging/packaging.expected/linux_beta_cosign.json b/recipes/packaging/packaging.expected/linux_beta_cosign.json
new file mode 100644
index 0000000..67dcec1
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_beta_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
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+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
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+  },
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+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
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+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
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+    "~followup_annotations": [
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+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
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+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
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+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
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+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
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+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
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+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
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+      "@@@STEP_NEST_LEVEL@2@@@"
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+          "update_token": "token"
+        },
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+      }
+    },
+    "name": "flutter doctor"
+  },
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+      "LUCI_PR": "",
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+      "PUB_CACHE": "[START_DIR]/.pub-cache",
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+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
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+      "realm": {
+        "name": "project:ci"
+      },
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+        "current_invocation": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
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+    "env_prefixes": {
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+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
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+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
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+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
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+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
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+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
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+      "realm": {
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+      },
+      "resultdb": {
+        "current_invocation": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
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+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_beta_experimental_cosign.json b/recipes/packaging/packaging.expected/linux_beta_experimental_cosign.json
new file mode 100644
index 0000000..83481d5
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_beta_experimental_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_beta_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/linux_beta_experimental_upload_cosign.json
new file mode 100644
index 0000000..83481d5
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_beta_experimental_upload_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_beta_upload_cosign.json b/recipes/packaging/packaging.expected/linux_beta_upload_cosign.json
new file mode 100644
index 0000000..67dcec1
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_beta_upload_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_dev_cosign.json b/recipes/packaging/packaging.expected/linux_dev_cosign.json
new file mode 100644
index 0000000..794c4e4
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_dev_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_dev_experimental_cosign.json b/recipes/packaging/packaging.expected/linux_dev_experimental_cosign.json
new file mode 100644
index 0000000..1f42819
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_dev_experimental_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_dev_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/linux_dev_experimental_upload_cosign.json
new file mode 100644
index 0000000..1f42819
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_dev_experimental_upload_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_dev_upload_cosign.json b/recipes/packaging/packaging.expected/linux_dev_upload_cosign.json
new file mode 100644
index 0000000..794c4e4
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_dev_upload_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_master_cosign.json b/recipes/packaging/packaging.expected/linux_master_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_master_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_master_experimental_cosign.json b/recipes/packaging/packaging.expected/linux_master_experimental_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_master_experimental_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_master_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/linux_master_experimental_upload_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_master_experimental_upload_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_master_upload_cosign.json b/recipes/packaging/packaging.expected/linux_master_upload_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_master_upload_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_stable_cosign.json b/recipes/packaging/packaging.expected/linux_stable_cosign.json
new file mode 100644
index 0000000..861d941
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_stable_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_stable_experimental_cosign.json b/recipes/packaging/packaging.expected/linux_stable_experimental_cosign.json
new file mode 100644
index 0000000..1c75f13
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_stable_experimental_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
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+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
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+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
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+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
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+      "submodule",
+      "update",
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+      "--recursive"
+    ],
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+    "infra_step": true,
+    "luci_context": {
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+      },
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+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
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+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
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+      "fetch",
+      "origin",
+      "master",
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+    "env": {
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+      },
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+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
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+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
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+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
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+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
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+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
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+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
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+      "submodule",
+      "update",
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+      "--recursive"
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+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_stable_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/linux_stable_experimental_upload_cosign.json
new file mode 100644
index 0000000..1c75f13
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_stable_experimental_upload_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/linux_stable_upload_cosign.json b/recipes/packaging/packaging.expected/linux_stable_upload_cosign.json
new file mode 100644
index 0000000..861d941
--- /dev/null
+++ b/recipes/packaging/packaging.expected/linux_stable_upload_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_beta_cosign.json b/recipes/packaging/packaging.expected/mac_beta_cosign.json
new file mode 100644
index 0000000..e6a903d
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_beta_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_beta_experimental_cosign.json b/recipes/packaging/packaging.expected/mac_beta_experimental_cosign.json
new file mode 100644
index 0000000..969f98b
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_beta_experimental_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_beta_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/mac_beta_experimental_upload_cosign.json
new file mode 100644
index 0000000..969f98b
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_beta_experimental_upload_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_beta_upload_cosign.json b/recipes/packaging/packaging.expected/mac_beta_upload_cosign.json
new file mode 100644
index 0000000..e6a903d
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_beta_upload_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=beta",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_dev_cosign.json b/recipes/packaging/packaging.expected/mac_dev_cosign.json
new file mode 100644
index 0000000..e9a736b
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_dev_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_dev_experimental_cosign.json b/recipes/packaging/packaging.expected/mac_dev_experimental_cosign.json
new file mode 100644
index 0000000..73b85ec
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_dev_experimental_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_dev_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/mac_dev_experimental_upload_cosign.json
new file mode 100644
index 0000000..73b85ec
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_dev_experimental_upload_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_dev_upload_cosign.json b/recipes/packaging/packaging.expected/mac_dev_upload_cosign.json
new file mode 100644
index 0000000..e9a736b
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_dev_upload_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=dev",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_master_cosign.json b/recipes/packaging/packaging.expected/mac_master_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_master_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_master_experimental_cosign.json b/recipes/packaging/packaging.expected/mac_master_experimental_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_master_experimental_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_master_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/mac_master_experimental_upload_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_master_experimental_upload_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_master_upload_cosign.json b/recipes/packaging/packaging.expected/mac_master_upload_cosign.json
new file mode 100644
index 0000000..fa87edb
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_master_upload_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_stable_cosign.json b/recipes/packaging/packaging.expected/mac_stable_cosign.json
new file mode 100644
index 0000000..93d9b7e
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_stable_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_stable_experimental_cosign.json b/recipes/packaging/packaging.expected/mac_stable_experimental_cosign.json
new file mode 100644
index 0000000..fa0f309
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_stable_experimental_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_stable_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/mac_stable_experimental_upload_cosign.json
new file mode 100644
index 0000000..fa0f309
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_stable_experimental_upload_cosign.json
@@ -0,0 +1,842 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/mac_stable_upload_cosign.json b/recipes/packaging/packaging.expected/mac_stable_upload_cosign.json
new file mode 100644
index 0000000..93d9b7e
--- /dev/null
+++ b/recipes/packaging/packaging.expected/mac_stable_upload_cosign.json
@@ -0,0 +1,843 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "dart",
+      "[START_DIR]/flutter/dev/bots/prepare_package.dart",
+      "--temp_dir=[START_DIR]/archive",
+      "--revision=deadbeef",
+      "--branch=stable",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]/archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]/archive/flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]/archive/flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "darwin",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]/flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]/flutter/bin",
+        "[START_DIR]/flutter/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_beta_cosign.json b/recipes/packaging/packaging.expected/win_beta_cosign.json
new file mode 100644
index 0000000..bc9bc1a
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_beta_cosign.json
@@ -0,0 +1,913 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=beta",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_beta_experimental_cosign.json b/recipes/packaging/packaging.expected/win_beta_experimental_cosign.json
new file mode 100644
index 0000000..a26cc34
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_beta_experimental_cosign.json
@@ -0,0 +1,912 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=beta"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_beta_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/win_beta_experimental_upload_cosign.json
new file mode 100644
index 0000000..a26cc34
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_beta_experimental_upload_cosign.json
@@ -0,0 +1,912 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
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+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
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+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
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+      "PATH": [
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
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+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+    "luci_context": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
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+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
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+      "ensure-directory",
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+      "0777",
+      "[START_DIR]\\archive"
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+      "LUCI_PR": "",
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+      "REVISION": "",
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+      "PATH": [
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+    "luci_context": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
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+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
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+      "-json-output",
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+      "PATH": [
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
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+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
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+      "@@@STEP_LOG_LINE@json.output@      {@@@",
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+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
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+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
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+      "--revision=deadbeef",
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+      "LUCI_CI": "True",
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
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+      "glob",
+      "[START_DIR]\\archive",
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+      "LUCI_CI": "True",
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
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+    "~followup_annotations": [
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+  },
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+      "LUCI_PR": "",
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+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
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+      "blob",
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+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+      "PATH": [
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+      "realm": {
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+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
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+  {
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+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_beta_upload_cosign.json b/recipes/packaging/packaging.expected/win_beta_upload_cosign.json
new file mode 100644
index 0000000..bc9bc1a
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_beta_upload_cosign.json
@@ -0,0 +1,913 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "beta",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=beta",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/beta/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_dev_cosign.json b/recipes/packaging/packaging.expected/win_dev_cosign.json
new file mode 100644
index 0000000..c3cb336
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_dev_cosign.json
@@ -0,0 +1,913 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=dev",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_dev_experimental_cosign.json b/recipes/packaging/packaging.expected/win_dev_experimental_cosign.json
new file mode 100644
index 0000000..fa00cd9
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_dev_experimental_cosign.json
@@ -0,0 +1,912 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_dev_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/win_dev_experimental_upload_cosign.json
new file mode 100644
index 0000000..fa00cd9
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_dev_experimental_upload_cosign.json
@@ -0,0 +1,912 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_dev_upload_cosign.json b/recipes/packaging/packaging.expected/win_dev_upload_cosign.json
new file mode 100644
index 0000000..c3cb336
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_dev_upload_cosign.json
@@ -0,0 +1,913 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "dev",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
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+      }
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+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
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+  },
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+        "hostname": "rdbhost"
+      }
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+  },
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+      "glob",
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+        },
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+      }
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+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/dev/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_master_cosign.json b/recipes/packaging/packaging.expected/win_master_cosign.json
new file mode 100644
index 0000000..71bf7b9
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_master_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_master_experimental_cosign.json b/recipes/packaging/packaging.expected/win_master_experimental_cosign.json
new file mode 100644
index 0000000..71bf7b9
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_master_experimental_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_master_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/win_master_experimental_upload_cosign.json
new file mode 100644
index 0000000..71bf7b9
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_master_experimental_upload_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_master_upload_cosign.json b/recipes/packaging/packaging.expected/win_master_upload_cosign.json
new file mode 100644
index 0000000..71bf7b9
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_master_upload_cosign.json
@@ -0,0 +1,413 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "failure": {
+      "failure": {},
+      "humanReason": "could not determine the release branch: either \"release_ref\" or \"git_ref\" properties should be set when manually triggering builds"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_stable_cosign.json b/recipes/packaging/packaging.expected/win_stable_cosign.json
new file mode 100644
index 0000000..60c788d
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_stable_cosign.json
@@ -0,0 +1,913 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=stable",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_stable_experimental_cosign.json b/recipes/packaging/packaging.expected/win_stable_experimental_cosign.json
new file mode 100644
index 0000000..0e31851
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_stable_experimental_cosign.json
@@ -0,0 +1,912 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=stable"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_stable_experimental_upload_cosign.json b/recipes/packaging/packaging.expected/win_stable_experimental_upload_cosign.json
new file mode 100644
index 0000000..0e31851
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_stable_experimental_upload_cosign.json
@@ -0,0 +1,912 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master"
+  },
+  {
+    "cmd": [],
+    "name": "checkout framework from master.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "doctor"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor"
+  },
+  {
+    "cmd": [
+      "flutter.bat",
+      "update-packages"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
+    "cmd": [
+      "cipd.bat",
+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=stable"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
+  {
+    "cmd": [
+      "vpython",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
+      "*flutter*.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "gcloud",
+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
+    "cmd": [
+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.expected/win_stable_upload_cosign.json b/recipes/packaging/packaging.expected/win_stable_upload_cosign.json
new file mode 100644
index 0000000..60c788d
--- /dev/null
+++ b/recipes/packaging/packaging.expected/win_stable_upload_cosign.json
@@ -0,0 +1,913 @@
+[
+  {
+    "cmd": [],
+    "name": "determine release revision"
+  },
+  {
+    "cmd": [],
+    "name": "determine release revision.Checkout flutter/flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]\\resources\\git_setup.py",
+      "--path",
+      "[START_DIR]\\flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "stable",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools];<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]\\flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "determine release revision.Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
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+    "name": "checkout framework from master.Checkout flutter/flutter.git fetch",
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+    "name": "checkout framework from master.Checkout flutter/flutter.git checkout",
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+    },
+    "name": "checkout framework from master.Checkout flutter/flutter.git clean",
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+    "name": "checkout framework from master.Checkout flutter/flutter.submodule update",
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "download dependencies"
+  },
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]\\archive"
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+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+    "env_prefixes": {
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+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
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+      "DEPOT_TOOLS_UPDATE": [
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+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
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+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "clean archive work directory"
+  },
+  {
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]\\archive"
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+      "GIT_BRANCH": "",
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+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
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+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
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+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
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+    "luci_context": {
+      "realm": {
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+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "(re)create archive work directory"
+  },
+  {
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+      "ensure",
+      "-root",
+      "[CACHE]\\builder\\7za",
+      "-ensure-file",
+      "flutter_internal/tools/7za/${platform} version:19.00",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
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+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
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+      "DEPOT_TOOLS_UPDATE": [
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+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-version:19.00---\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"flutter_internal/tools/7za/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart.exe",
+      "[START_DIR]\\flutter\\dev\\bots\\prepare_package.dart",
+      "--temp_dir=[START_DIR]\\archive",
+      "--revision=deadbeef",
+      "--branch=stable",
+      "--publish"
+    ],
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
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+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
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+      ],
+      "PATH": [
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "prepare, create and publish a flutter archive"
+  },
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]\\resources\\fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[START_DIR]\\archive",
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+    ],
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
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+        "[START_DIR]\\flutter\\bin",
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+      "PATH": [
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+      "realm": {
+        "name": "project:ci"
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+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "get flutter archive file name",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@glob@[START_DIR]\\archive\\flutter-archive-package.tar.xz@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
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+      "auth",
+      "configure-docker",
+      "us-docker.pkg.dev"
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "configure docker registry"
+  },
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+      "upload",
+      "blob",
+      "-f",
+      "[START_DIR]\\archive\\flutter-archive-package.tar.xz",
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
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+    "env_prefixes": {
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+        "[START_DIR]\\flutter\\bin",
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+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
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+      "PATH": [
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+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
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+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "upload through cosign"
+  },
+  {
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+      "cosign",
+      "sign",
+      "--key",
+      "gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2",
+      "us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts/stable/deadbeef/flutter-archive-package.tar.xz"
+    ],
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "win",
+      "PUB_CACHE": "[START_DIR]\\.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[START_DIR]\\flutter"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]\\builder\\7za",
+        "[START_DIR]\\flutter\\bin",
+        "[START_DIR]\\flutter\\bin\\cache\\dart-sdk\\bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "sign flutter artifact"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/packaging/packaging.py b/recipes/packaging/packaging.py
index c8f4d59..0659c57 100644
--- a/recipes/packaging/packaging.py
+++ b/recipes/packaging/packaging.py
@@ -10,6 +10,7 @@
 DEPS = [
     'depot_tools/depot_tools',
     'depot_tools/git',
+    'flutter/flutter_deps',
     'flutter/repo_util',
     'recipe_engine/buildbucket',
     'recipe_engine/cipd',
@@ -61,6 +62,54 @@
       if not api.runtime.is_experimental:
         step_args.append('--publish')
       api.step('prepare, create and publish a flutter archive', step_args)
+      if api.properties.get('upload_with_cosign') is True:
+        flutter_package_absolute_path = GetFlutterPackageAbsolutePath(api, work_dir)
+        UploadAndSignFlutterPackage(api, flutter_package_absolute_path, git_hash, branch)
+
+
+def GetFlutterPackageAbsolutePath(api, work_dir):
+  """Gets full flutter package directory if it exists."""
+  files = api.file.glob_paths('get flutter archive file name', work_dir, '*flutter*.tar.xz', test_data=['flutter-archive-package.tar.xz'])
+  return files[0] if len(files) == 1 else None
+
+
+def UploadAndSignFlutterPackage(api, flutter_path, git_hash, branch):
+  """Uploads flutter package to the artifact registry, then signs it using a KMS key.
+  This is all done using the package cosign.
+  """
+  if not api.runtime.is_experimental:
+    base_artifact_registry_url = 'us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts' # TODO(drewroen) Update production url to an actual production url
+  else:
+    base_artifact_registry_url = 'us-docker.pkg.dev/flutter-dashboard-dev/flutter-artifacts'
+
+  artifact_registry_url = '%s/%s/%s/%s' % (base_artifact_registry_url, branch, git_hash, api.path.basename(flutter_path))
+
+  gcloud_docker_config_args = [
+      'gcloud',
+      'auth',
+      'configure-docker',
+      'us-docker.pkg.dev'
+  ]
+
+  cosign_upload_args = [
+      'cosign',
+      'upload',
+      'blob',
+      '-f',
+      flutter_path,
+      artifact_registry_url
+  ]
+
+  cosign_sign_args = [
+      'cosign',
+      'sign',
+      '--key',
+      'gcpkms://projects/flutter-dashboard-dev/locations/global/keyRings/flutter/cryptoKeys/mykey2',
+      artifact_registry_url
+  ]
+  api.step('configure docker registry', gcloud_docker_config_args)
+  api.step('upload through cosign', cosign_upload_args)
+  api.step('sign flutter artifact', cosign_sign_args)
 
 
 def RunSteps(api):
@@ -87,6 +136,9 @@
         ref='master',
     )
   env, env_prefixes = api.repo_util.flutter_environment(checkout_path)
+  api.flutter_deps.required_deps(
+      env, env_prefixes, api.properties.get('dependencies', [])
+  )
   release_ref = api.properties.get('release_ref') or git_ref
 
   packaging_script = checkout_path.join(
@@ -111,19 +163,24 @@
     for should_upload in (True, False):
       for platform in ('mac', 'linux', 'win'):
         for branch in ('master', 'dev', 'beta', 'stable'):
-          git_ref = 'refs/heads/' + branch
-          test = api.test(
-              '%s_%s%s%s' % (
-                  platform, branch, '_experimental' if experimental else '',
-                  '_upload' if should_upload else ''
-              ), api.platform(platform, 64),
-              api.buildbucket.ci_build(git_ref=git_ref, revision=None),
-              api.properties(
-                  shard='tests',
-                  fuchsia_ctl_version='version:0.0.2',
-                  upload_packages=should_upload,
-                  gold_tryjob=not should_upload
-              ), api.runtime(is_experimental=experimental),
-              api.repo_util.flutter_environment_data()
-          )
-          yield test
+          for upload_with_cosign in (True, False):
+            git_ref = 'refs/heads/' + branch
+            test = api.test(
+                '%s_%s%s%s%s' % (
+                    platform,
+                    branch,
+                    '_experimental' if experimental else '',
+                    '_upload' if should_upload else '',
+                    '_cosign' if upload_with_cosign else ''
+                ), api.platform(platform, 64),
+                api.buildbucket.ci_build(git_ref=git_ref, revision=None),
+                api.properties(
+                    shard='tests',
+                    fuchsia_ctl_version='version:0.0.2',
+                    upload_packages=should_upload,
+                    gold_tryjob=not should_upload,
+                    upload_with_cosign=upload_with_cosign
+                ), api.runtime(is_experimental=experimental),
+                api.repo_util.flutter_environment_data()
+            )
+            yield test