diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index dfdd20c..5091203 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -22,22 +22,22 @@
   "deps": {
     "dart": {
       "branch": "refs/heads/main",
-      "revision": "b28aea987fc08112d56477e4c61e834dd4b6a159",
+      "revision": "3d214bab069ef71b2d41da9d996ef5a9526ba92b",
       "url": "https://dart.googlesource.com/recipes.git"
     },
     "depot_tools": {
       "branch": "refs/heads/main",
-      "revision": "78bef266ac91475b66a2e91890a1cfc111ccee4b",
+      "revision": "fb76ce5eee340b41ab01825dd3d9b8401fd34e02",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "fuchsia": {
       "branch": "refs/heads/main",
-      "revision": "96678c4a0d4d4998dd0c9924912e9f2bd28219bc",
+      "revision": "6739756ec9ed8a56be01a2bca2351285986bf4eb",
       "url": "https://fuchsia.googlesource.com/infra/recipes.git"
     },
     "recipe_engine": {
       "branch": "refs/heads/main",
-      "revision": "81fd7805b848baa52de454afdfcdc78f4c8550a1",
+      "revision": "3b1cb2ea044128062ffa57715df89b1efaaaba38",
       "url": "https://chromium.googlesource.com/infra/luci/recipes-py.git"
     }
   },
diff --git a/recipe_modules/recipe_testing/tests/full.expected/no_latest_cl.json b/recipe_modules/recipe_testing/tests/full.expected/no_latest_cl.json
index 86023e9..372cb75 100644
--- a/recipe_modules/recipe_testing/tests/full.expected/no_latest_cl.json
+++ b/recipe_modules/recipe_testing/tests/full.expected/no_latest_cl.json
@@ -358,7 +358,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -593,7 +594,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.arm64-debug.led edit-cr-cl",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -615,7 +616,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -669,7 +671,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.arm64-debug.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -691,7 +693,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -749,7 +752,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.arm64-debug.led edit (2)",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -771,7 +774,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -827,7 +831,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.arm64-debug.led edit-recipe-bundle",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -849,7 +853,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"200\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -996,7 +1001,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -1043,7 +1049,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.x64-debug.led edit-cr-cl",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1065,7 +1071,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -1119,7 +1126,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.x64-debug.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1141,7 +1148,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -1199,7 +1207,7 @@
       }
     },
     "name": "get builders.fuchsia/try/core.x64-debug.led edit (2)",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
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       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1221,7 +1229,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -1277,7 +1286,7 @@
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     "name": "get builders.fuchsia/try/core.x64-debug.led edit-recipe-bundle",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1299,7 +1308,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -1401,7 +1411,7 @@
       }
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     "name": "launch/collect.0.launch.fuchsia/try/core.arm64-debug (attempt 0).led launch",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.arm64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"200\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"200\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"9095eb4fe66a5a67626c5af808e1298598a94bfc48e07c7232161b1128bac0be\",\n                        \"size_bytes\": \"1337\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@4@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -1442,7 +1452,7 @@
       }
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     "name": "launch/collect.0.launch.fuchsia/try/core.x64-debug (attempt 0).led launch",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"9095eb4fe66a5a67626c5af808e1298598a94bfc48e07c7232161b1128bac0be\",\n                        \"size_bytes\": \"1337\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"host\": \"flutter-review.googlesource.com\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@4@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
diff --git a/recipe_modules/recipe_testing/tests/full.expected/recipes.json b/recipe_modules/recipe_testing/tests/full.expected/recipes.json
index 7f26885..09534f1 100644
--- a/recipe_modules/recipe_testing/tests/full.expected/recipes.json
+++ b/recipe_modules/recipe_testing/tests/full.expected/recipes.json
@@ -313,7 +313,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -360,7 +361,7 @@
       }
     },
     "name": "get builders.fuchsia/try/recipes.led edit-cr-cl",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/recipes\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"recipes\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@2@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -382,7 +383,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -438,7 +440,7 @@
       }
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     "name": "get builders.fuchsia/try/recipes.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/recipes\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"change\": \"123456\",\n              \"host\": \"flutter-review.googlesource.com\",\n              \"patchset\": \"1337\",\n              \"project\": \"recipes\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"recipes\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/recipes\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"change\": \"123456\",\n              \"host\": \"flutter-review.googlesource.com\",\n              \"patchset\": \"1337\",\n              \"project\": \"recipes\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"recipe\": \"recipes\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
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       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -460,7 +462,8 @@
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
       "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"id\": \"100\",@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
       "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
@@ -520,7 +523,7 @@
       }
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     "name": "get builders.fuchsia/try/recipes.led edit (2)",
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@@ -622,7 +626,8 @@
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diff --git a/recipe_modules/recipe_testing/tests/full.expected/two_pass_one_skip.json b/recipe_modules/recipe_testing/tests/full.expected/two_pass_one_skip.json
index da9b9b2..dfe32bc 100644
--- a/recipe_modules/recipe_testing/tests/full.expected/two_pass_one_skip.json
+++ b/recipe_modules/recipe_testing/tests/full.expected/two_pass_one_skip.json
@@ -362,7 +362,8 @@
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@@ -804,7 +805,7 @@
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@@ -826,7 +827,8 @@
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@@ -882,7 +884,7 @@
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@@ -904,7 +906,8 @@
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@@ -986,7 +989,8 @@
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@@ -1044,7 +1048,7 @@
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     },
     "name": "launch/collect.0.launch.fuchsia/try/core.x64-debug (attempt 0).led launch",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"9095eb4fe66a5a67626c5af808e1298598a94bfc48e07c7232161b1128bac0be\",\n                        \"size_bytes\": \"1337\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"change\": \"12345\",\n              \"host\": \"flutter-review.googlesource.com\",\n              \"patchset\": \"6\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try\",\n          \"builder\": \"fuchsia/try/core.x64-debug\",\n          \"project\": \"flutter\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 34500.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"9095eb4fe66a5a67626c5af808e1298598a94bfc48e07c7232161b1128bac0be\",\n                        \"size_bytes\": \"1337\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"change\": \"12345\",\n              \"host\": \"flutter-review.googlesource.com\",\n              \"patchset\": \"6\",\n              \"project\": \"flutter\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"flutter\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$flutter/recipe_testing\": {\n              \"enabled\": true,\n              \"recipe_depth\": 1.0\n            },\n            \"recipe\": \"fuchsia\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@4@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
diff --git a/recipe_modules/shard_util_v2/examples/full.expected/monorepo_led_subbuilds.json b/recipe_modules/shard_util_v2/examples/full.expected/monorepo_led_subbuilds.json
index d24e69d..a44655d 100644
--- a/recipe_modules/shard_util_v2/examples/full.expected/monorepo_led_subbuilds.json
+++ b/recipe_modules/shard_util_v2/examples/full.expected/monorepo_led_subbuilds.json
@@ -43,7 +43,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -101,7 +103,7 @@
       }
     },
     "name": "launch builds.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -122,7 +124,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -211,7 +215,7 @@
       }
     },
     "name": "launch builds.led edit (2)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -232,7 +236,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -322,7 +328,7 @@
       }
     },
     "name": "launch builds.led edit (3)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -343,7 +349,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -433,7 +441,7 @@
       }
     },
     "name": "launch builds.led edit (4)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
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     "~followup_annotations": [
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@@ -454,7 +462,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
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       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -544,7 +554,7 @@
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     "name": "launch builds.led edit (5)",
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     "~followup_annotations": [
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@@ -565,7 +575,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
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+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -655,7 +667,7 @@
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     "name": "launch builds.led edit (6)",
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -676,7 +688,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -766,7 +780,7 @@
       }
     },
     "name": "launch builds.led edit (7)",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-linux-ios_debug\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -787,7 +801,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
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     "name": "launch builds.led launch",
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     "~followup_annotations": [
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       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -1287,7 +1303,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
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     "~followup_annotations": [
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@@ -1366,7 +1384,9 @@
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       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
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@@ -1460,7 +1480,7 @@
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     "name": "launch builds (2).led edit (2)",
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     "~followup_annotations": [
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@@ -1481,7 +1501,9 @@
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@@ -1576,7 +1598,7 @@
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     "name": "launch builds (2).led edit (3)",
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     "~followup_annotations": [
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@@ -1597,7 +1619,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
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       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
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     "name": "launch builds (2).led edit (4)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-None-felt_test\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-None-felt_test\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1713,7 +1737,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
@@ -1827,7 +1853,7 @@
       }
     },
     "name": "launch builds (2).led launch",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-None-felt_test\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci.sandbox\",\n          \"builder\": \"flutter-None-felt_test\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://dart.googlesource.com/monorepo\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
diff --git a/recipe_modules/shard_util_v2/examples/full.expected/monorepo_try_led_subbuilds.json b/recipe_modules/shard_util_v2/examples/full.expected/monorepo_try_led_subbuilds.json
index 996170c..a2191ef 100644
--- a/recipe_modules/shard_util_v2/examples/full.expected/monorepo_try_led_subbuilds.json
+++ b/recipe_modules/shard_util_v2/examples/full.expected/monorepo_try_led_subbuilds.json
@@ -51,7 +51,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -107,7 +109,7 @@
       }
     },
     "name": "launch builds.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -128,7 +130,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -216,7 +220,7 @@
       }
     },
     "name": "launch builds.led edit (2)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -237,7 +241,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -326,7 +332,7 @@
       }
     },
     "name": "launch builds.led edit (3)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -347,7 +353,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -436,7 +444,7 @@
       }
     },
     "name": "launch builds.led edit (4)",
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     "~followup_annotations": [
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       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -457,7 +465,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -546,7 +556,7 @@
       }
     },
     "name": "launch builds.led edit (5)",
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -567,7 +577,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -656,7 +668,7 @@
       }
     },
     "name": "launch builds.led edit (6)",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-linux-ios_debug-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -677,7 +689,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -766,7 +780,7 @@
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     },
     "name": "launch builds.led edit (7)",
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -787,7 +801,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
@@ -894,7 +910,7 @@
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     "name": "launch builds.led edit-cr-cl",
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -915,7 +931,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
@@ -1031,7 +1049,7 @@
       }
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     "name": "launch builds.led launch",
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -1430,7 +1448,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -1486,7 +1506,7 @@
       }
     },
     "name": "launch builds (2).led edit",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-None-felt_test-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1507,7 +1527,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -1600,7 +1622,7 @@
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@@ -2105,7 +2135,7 @@
       }
     },
     "name": "launch builds (2).led launch",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-None-felt_test-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"change\": \"9425\",\n              \"host\": \"dart-review.googlesource.com\",\n              \"patchset\": \"3\",\n              \"project\": \"sdk\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"try.monorepo\",\n          \"builder\": \"flutter-None-felt_test-try\",\n          \"project\": \"dart\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gerrit_changes\": [\n            {\n              \"change\": \"9425\",\n              \"host\": \"dart-review.googlesource.com\",\n              \"patchset\": \"3\",\n              \"project\": \"sdk\"\n            }\n          ],\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ],\n            \"try_build_identifier\": \"8945511751514863184\"\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
diff --git a/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led.json b/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led.json
index eb6903d..19af226 100644
--- a/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led.json
+++ b/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led.json
@@ -43,7 +43,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -101,7 +103,7 @@
       }
     },
     "name": "launch builds.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -122,7 +124,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -211,7 +215,7 @@
       }
     },
     "name": "launch builds.led edit (2)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -232,7 +236,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -322,7 +328,7 @@
       }
     },
     "name": "launch builds.led edit (3)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -343,7 +349,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -433,7 +441,7 @@
       }
     },
     "name": "launch builds.led edit (4)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
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     "~followup_annotations": [
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@@ -454,7 +462,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
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-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
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@@ -544,7 +554,7 @@
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     "name": "launch builds.led edit (5)",
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     "~followup_annotations": [
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@@ -565,7 +575,9 @@
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       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -655,7 +667,7 @@
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     "name": "launch builds.led edit (6)",
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -676,7 +688,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -766,7 +780,7 @@
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     },
     "name": "launch builds.led edit (7)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
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@@ -787,7 +801,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
@@ -896,7 +912,7 @@
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     },
     "name": "launch builds.led launch",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -1287,7 +1303,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -1345,7 +1363,7 @@
       }
     },
     "name": "launch builds (2).led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1366,7 +1384,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -1460,7 +1480,7 @@
       }
     },
     "name": "launch builds (2).led edit (2)",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1481,7 +1501,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -1576,7 +1598,7 @@
       }
     },
     "name": "launch builds (2).led edit (3)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1597,7 +1619,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -1692,7 +1716,7 @@
       }
     },
     "name": "launch builds (2).led edit (4)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -1713,7 +1737,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
@@ -1827,7 +1853,7 @@
       }
     },
     "name": "launch builds (2).led launch",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"buildbucket\": {\n            \"agent\": {\n              \"input\": {\n                \"data\": {\n                  \"kitchen-checkout\": {\n                    \"cas\": {\n                      \"digest\": {\n                        \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                        \"size_bytes\": \"91\"\n                      }\n                    }\n                  }\n                }\n              },\n              \"purposes\": {\n                \"kitchen-checkout\": \"PURPOSE_EXE_PAYLOAD\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dependencies\": [\n                \"ios_debug\"\n              ],\n              \"name\": \"felt_test\",\n              \"parameters\": [\n                \"test\"\n              ],\n              \"recipe\": \"engine_v2/tester\",\n              \"resolved_deps\": [\n                {\n                  \"full_build\": \"123\",\n                  \"ios_debug\": \"bcd\",\n                  \"web_tests\": \"abc\"\n                }\n              ],\n              \"scripts\": [\n                \"out/script.sh\"\n              ]\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"refs/123/main\",\n            \"git_url\": \"http://abc\",\n            \"recipe\": \"engine_v2/tester\",\n            \"task_name\": \"felt_test\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"felt_test\"\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
diff --git a/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led_subbuilds.json b/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led_subbuilds.json
index 4914e60..8a9549e 100644
--- a/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led_subbuilds.json
+++ b/recipe_modules/shard_util_v2/examples/full.expected/presubmit_led_subbuilds.json
@@ -43,7 +43,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -101,7 +103,7 @@
       }
     },
     "name": "launch builds.led edit",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -122,7 +124,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -211,7 +215,7 @@
       }
     },
     "name": "launch builds.led edit (2)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://github.com/repo/a\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://github.com/repo/a\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -232,7 +236,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -322,7 +328,7 @@
       }
     },
     "name": "launch builds.led edit (3)",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \"Linux Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {}\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          },\n          \"properties\": {\n            \"$recipe_engine/led\": {\n              \"led_run_id\": \"flutter/led/abc_google.com/b9861e3db1034eee460599837221ab468e03bc43f9fd05684a08157fd646abfc\",\n              \"rbe_cas_input\": {\n                \"cas_instance\": \"projects/chromium-swarm/instances/default_instance\",\n                \"digest\": {\n                  \"hash\": \"146d56311043bb141309968d570e23d05a108d13ce2e20b5aeb40a9b95629b3e\",\n                  \"size_bytes\": 91.0\n                }\n              }\n            },\n            \"build\": {\n              \"dimensions\": {\n                \"cpu\": \"arm64\"\n              },\n              \"drone_dimensions\": [\n                \"dimension1=abc\",\n                \"os=Linux\"\n              ],\n              \"gn\": [],\n              \"name\": \"ios_debug\",\n              \"ninja\": [\n                \"ios_debug\"\n              ],\n              \"recipe\": \"engine_v2/builder\"\n            },\n            \"environment\": \"Staging\",\n            \"gclient_variables\": {},\n            \"git_ref\": \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n            \"git_url\": \"https://github.com/repo/a\",\n            \"recipe\": \"engine_v2/builder\",\n            \"task_name\": \"ios_debug\",\n            \"tests\": [\n              {\n                \"dependencies\": [\n                  \"ios_debug\"\n                ],\n                \"name\": \"felt_test\",\n                \"parameters\": [\n                  \"test\"\n                ],\n                \"scripts\": [\n                  \"out/script.sh\"\n                ]\n              }\n            ]\n          }\n        }\n      }\n    },\n    \"name\": \"ios_debug\"\n  }\n}",
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     "~followup_annotations": [
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@@ -343,7 +349,9 @@
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     "name": "launch builds.led edit (4)",
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     "~followup_annotations": [
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     "name": "launch builds.led edit (5)",
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     "~followup_annotations": [
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@@ -565,7 +575,9 @@
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     "name": "launch builds.led edit (6)",
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     "~followup_annotations": [
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     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@proto.output@{@@@",
@@ -787,7 +801,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
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       "@@@STEP_LOG_LINE@proto.output@          \"buildbucket\": {@@@",
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     "~followup_annotations": [
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       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -1287,7 +1303,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 30.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
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@@ -1345,7 +1363,7 @@
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     "name": "launch builds (2).led edit",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"ci\",\n          \"builder\": \" Engine Drone\",\n          \"project\": \"proj\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"87654321\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 10.0\n            },\n            \"task\": {\n              \"id\": {\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:87654321\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
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@@ -1366,7 +1384,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 10.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
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@@ -1460,7 +1480,7 @@
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     "name": "launch builds (2).led edit (2)",
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     "~followup_annotations": [
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@@ -1481,7 +1501,9 @@
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       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
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@@ -1576,7 +1598,7 @@
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     "name": "launch builds (2).led edit (3)",
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@@ -1597,7 +1619,9 @@
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     "~followup_annotations": [
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@@ -1713,7 +1737,9 @@
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+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
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     "~followup_annotations": [
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diff --git a/recipe_modules/swarming_retry/tests/full.expected/led_task.json b/recipe_modules/swarming_retry/tests/full.expected/led_task.json
index 0ae1184..0d3b1ae 100644
--- a/recipe_modules/swarming_retry/tests/full.expected/led_task.json
+++ b/recipe_modules/swarming_retry/tests/full.expected/led_task.json
@@ -25,7 +25,9 @@
       "@@@STEP_LOG_LINE@proto.output@              \"priority\": 100.0@@@",
       "@@@STEP_LOG_LINE@proto.output@            },@@@",
       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
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       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -82,7 +84,7 @@
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     "infra_step": true,
     "name": "launch/collect.0.launch.task (attempt 0).led launch",
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+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"bucket\",\n          \"builder\": \"builder\",\n          \"project\": \"project\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 30.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
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@@ -248,7 +250,7 @@
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     "name": "launch/collect.1.launch.task (attempt 1).led launch",
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diff --git a/recipe_modules/swarming_retry/tests/full.expected/led_task_hardcoded_attempt.json b/recipe_modules/swarming_retry/tests/full.expected/led_task_hardcoded_attempt.json
index 19c7550..7aa228a 100644
--- a/recipe_modules/swarming_retry/tests/full.expected/led_task_hardcoded_attempt.json
+++ b/recipe_modules/swarming_retry/tests/full.expected/led_task_hardcoded_attempt.json
@@ -25,7 +25,9 @@
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       "@@@STEP_LOG_LINE@proto.output@            \"task\": {@@@",
-      "@@@STEP_LOG_LINE@proto.output@              \"id\": {}@@@",
+      "@@@STEP_LOG_LINE@proto.output@              \"id\": {@@@",
+      "@@@STEP_LOG_LINE@proto.output@                \"target\": \"swarming://chromium-swarm\"@@@",
+      "@@@STEP_LOG_LINE@proto.output@              }@@@",
       "@@@STEP_LOG_LINE@proto.output@            }@@@",
       "@@@STEP_LOG_LINE@proto.output@          },@@@",
       "@@@STEP_LOG_LINE@proto.output@          \"resultdb\": {@@@",
@@ -82,7 +84,7 @@
     ],
     "infra_step": true,
     "name": "launch/collect.0.launch.task (attempt 0).led launch",
-    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"bucket\",\n          \"builder\": \"builder\",\n          \"project\": \"project\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 30.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
+    "stdin": "{\n  \"buildbucket\": {\n    \"bbagent_args\": {\n      \"build\": {\n        \"builder\": {\n          \"bucket\": \"bucket\",\n          \"builder\": \"builder\",\n          \"project\": \"project\"\n        },\n        \"create_time\": \"2018-05-25T23:50:17Z\",\n        \"created_by\": \"user:luci-scheduler@appspot.gserviceaccount.com\",\n        \"id\": \"100\",\n        \"infra\": {\n          \"backend\": {\n            \"config\": {\n              \"priority\": 30.0\n            },\n            \"task\": {\n              \"id\": {\n                \"id\": \"100\",\n                \"target\": \"swarming://chromium-swarm\"\n              }\n            }\n          },\n          \"resultdb\": {\n            \"invocation\": \"invocations/build:8945511751514863184\"\n          }\n        },\n        \"input\": {\n          \"gitiles_commit\": {\n            \"host\": \"chromium.googlesource.com\",\n            \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\",\n            \"project\": \"project\",\n            \"ref\": \"refs/heads/main\"\n          }\n        }\n      }\n    }\n  }\n}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@4@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",