flutter-skills-indexlisted

# Flutter skills index (generated by `update.py` from each skill's frontmatter) Load the ONE most specific skill; load a second only if the task clearly spans both. - **flutter-architecture**: Current (2026) Flutter app architecture from the Flutter team's official guide, Very Good Ventures and LeanCode - UI layer (View + ViewModel/Cubit/Notifier) and data layer (Repository + Service), feature folders, dependency injection, Result/Command patterns, networking and JSON models, go_router, monorepos with pub workspaces, day-one project setup, scaling teams, legacy refactoring. - **flutter-dart-style**: Write modern, concise, idiomatic Dart 3.13 / Flutter 3.47 code - primary constructors, private named parameters, dot shorthands, null-aware elements, patterns and sealed classes, records, extension types, widget-class conventions, const, lints (very_good_analysis/flutter_lints), Effective Dart naming. - **flutter-performance**: Flutter performance and app-size optimization (Flutter 3.47 official perf docs + LeanCode) - jank and dropped frames, excessive rebuilds, heavy build() work, isolates/compute, long lists (ListView.builder, GridView.builder, slivers, shrinkWrap), image memory (cacheWidth), Opacity/saveLayer/clipping, intrinsics, Impeller, RepaintBoundary, CustomPaint shouldRepaint, Flutter Web rebuilds, APK/IPA size analysis. - **flutter-state-management**: Choose and correctly use Flutter state management with current (2026) APIs - Riverpod 3 (Notifier/AsyncNotifier, muta