There's code like https://cs.opensource.google/flutter/cocoon/+/main:app_dart/lib/src/request_handlers/github/webhook_subscription.dart;l=352 that can be moved into the repo under test.

This should make it easier to find, and quicker to deploy.

• Add docs on adding new labels - https://github.com/flutter/flutter/wiki/Labeling-PRs
• Migrate flutter/flutter - [github] Add labeler action #126012
• Migrate flutter/engine - [labeler] Add engine workflow engine#42566
• Migrate flutter/packages - Add auto-labelling for PRs packages#335
• Remove label functionality from Cocoon - [app_dart] Remove labeling logic cocoon#2687