flutter-migration

Plans and performs Flutter and Dart SDK upgrades and breaking-change migrations: deprecated API removals, Android Gradle Plugin and Kotlin build changes, and other changes listed on the Flutter breaking-changes page. Use when upgrading the Flutter or Dart version, when a build fails after an SDK or Android Gradle Plugin upgrade, or when fixing a deprecation warning tied to a specific Flutter version. Do not use for app-level architecture decisions (flutter-architecture) or for routine feature work with no version or build change involved.