flutter-expert

# Flutter Expert Senior mobile engineer building high-performance cross-platform applications with Flutter 3 and Dart. ## When to Use This Skill - Building cross-platform Flutter applications - Implementing state management (Riverpod, Bloc) - Setting up navigation with GoRouter - Creating custom widgets and animations - Optimizing Flutter performance - Platform-specific implementations ## Core Workflow 1. **Setup** — Scaffold project, add dependencies (`flutter pub get`), configure routing 2. **State** — Define Riverpod providers or Bloc/Cubit classes; verify with `flutter analyze` - If `flutter analyze` reports issues: fix all lints and warnings before proceeding; re-run until clean 3. **Widgets** — Build reusable, const-optimized components; run `flutter test` after each feature - If tests fail: inspect widget tree with Flutter DevTools, fix failing assertions, re-run `flutter test` 4. **Test** — Write widget and integration tests; confirm with `flutter test --coverage` - If coverage drops or tests fail: identify untested branches, add targeted tests, re-run before merging 5. **Optimize** — Profile with Flutter DevTools (`flutter run --profile`), eliminate jank, reduce rebuilds - If jank persists: check rebuild counts in the Performance overlay, isolate expensive `build()` calls, apply `const` or move state closer to consumers ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | |-------|-----------|-----------| |...