Flutter development with Riverpod state management, Freezed, go_router, and mocktail testing

Flutter Skill Project Structure Riverpod State Management Provider Types Notifier Pattern AsyncValue Handling ref Methods Freezed Data Models Model Definition Using Freezed Unions go router Navigation Router Configuration Navigation Widget Patterns ConsumerWidget vs ConsumerStatefulWidget HookConsumerWidget (with flutter hooks) Testing with Mocktail Unit Tests Widget Tests pubspec.yaml GitHub Actions analysis options.yaml Flutter Anti Patterns ❌ Provider without autoDispose Use .autoDispose to prevent memory leaks ❌ watch in callbacks Use ref.read() in onPressed/callbacks, not ref.watch() ❌ Business logic in widgets Move to Notifiers/providers ❌ Mutable state in providers Use Freezed for immutable models ❌ Not using AsyncValue Handle loading/error states with when() ❌ setState with Riverpod Use providers for shared state ❌ Passing ref to functions Keep ref usage within widgets/providers ❌ Deeply nested Consumer Use ConsumerWidget instead ❌ Not using family for params Use .family for parameterized providers ❌ Global GoRouter instance Use Provider for router with redirect logic ❌ BuildContext across async Store values before await, not context ❌ Ignoring dispose Clean up controllers in ConsumerStatefulWidget