Unexpected Plugins and Packages failures.Plugins and Packages repository structure.Setting up the Packages development environment.Setting up the Plugins development environment.Engine-specific Service Protocol extensions.Custom Flutter Engine Embedding in AOT Mode.Using Sanitizers with the Flutter Engine.Setting up the Engine development environment.Writing a golden-file test for package:flutter.Setting up the Framework development environment.Manual Engine Roll with Breaking Commits.How to write a render speed test for Flutter.