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Found 2 Skills
Executes long-running tasks in background isolates to keep the UI responsive. Use when performing heavy computations or parsing large datasets.
Enforces Flutter widget composition — extract named const Widget classes never `Widget _buildX()` methods, lean build() (no I/O/formatting/domain math, precompute in the ViewModel), dumb Views that watch one Notifier and route intents via ref.read, StatelessWidget by default with every controller disposed, lazy `.builder` lists, cheapest-widget choices (SizedBox/ColoredBox/Align over Container), a strict key policy (ValueKey for reorderable lists, never GlobalKey), gesture→visible-focusable-fallback wiring, plus structural layout — full-bleed background vs SafeArea content, computed cell sizing, the GridView cross/main-axis spacing trap, EdgeInsetsDirectional, and resizeToAvoidBottomInset/IME handling. Use when building or refactoring any screen or widget, splitting a large build() into components, writing GridView/ListView/LayoutBuilder/SafeArea/Scaffold, wiring onTap/onLongPress/Draggable, choosing a key or data class, or reviewing widget code in a diff.