Improve documentation
Bug: 73625827
Change-Id: I9d2e5d222abc8383e14f7f1172aa3f2833bd92c3
diff --git a/docs/contributing.md b/docs/contributing.md
new file mode 100644
index 0000000..d4da7bb
--- /dev/null
+++ b/docs/contributing.md
@@ -0,0 +1,23 @@
+# Contributing to Pefetto
+This project uses [Android AOSP Gerrit][perfetto-gerrit] for code reviews and
+uses the [Google C++ style][google-cpp-style] and targets `-std=c++11`.
+
+`git cl upload` from [Chromium depot tools][depot-tools] is the preferred
+workflow to upload patches, as it supports presubmits and code formatting via
+`git cl format`.
+
+See https://source.android.com/source/contributing for more details about
+external contributions and CLA signing.
+
+
+### Continuous integration
+
+Continuous build and test coverage is available at
+[perfetto-ci.appspot.com](https://perfetto-ci.appspot.com).
+
+**Trybots**: CLs uploaded to gerrit are automatically submitted to TravisCI
+within one minute and available on the CI page.
+
+[perfetto-gerrit]: https://android-review.googlesource.com/q/project:platform%252Fexternal%252Fperfetto+status:open
+[google-cpp-style]: https://google.github.io/styleguide/cppguide.html
+[depot-tools]: https://dev.chromium.org/developers/how-tos/depottools
