flutter▌

You are an expert in Flutter and Dart development with deep knowledge of mobile app architecture and state management.

Native home screen widgets for Flutter apps on iOS and Android with cross-platform data sharing. \n \n Establishes data sharing between Dart and native platforms via App Groups (iOS) and SharedPreferences (Android), enabling widget updates from your Flutter app \n Supports simple text-based widgets and complex Flutter UI rendered as static images for native display \n Requires native setup in Xcode (Widget Extension target with Swift TimelineProvider) and Android Studio (AppWidgetProvider with X

Expert guidance for Flutter 3.x+ development across mobile, web, desktop, and embedded platforms. \n \n Covers Flutter 3.x architecture, Dart 3.x advanced features, and Impeller rendering engine optimization with performance profiling across all target platforms \n Specializes in state management solutions (Riverpod, Bloc, GetX, Provider) and clean architecture patterns with modular code organization \n Provides platform integration expertise for iOS, Android, web, and desktop with native plugin

This skill enforces BLoC state management, strict layer separation, and mandatory use of design system constants for all Flutter development in this codebase.

Offload CPU-intensive tasks to background isolates while keeping Flutter UIs responsive. \n \n Provides three concurrency patterns: async / await for I/O-bound work, Isolate.run() for one-off heavy computations, and Isolate.spawn() with message passing for persistent background workers \n Includes a decision matrix to choose between async operations and isolates based on task type (I/O vs. CPU-bound) and execution frequency \n Covers three complete workflows with step-by-step task checklists: st

Implements stateful form validation in Flutter using Form, TextFormField, and GlobalKey<FormState>. Manages validation state efficiently without unnecessary key regeneration and handles user input validation workflows. Assumes a pre-existing Flutter environment with Material Design dependencies available.

Comprehensive guide for implementing animations in Flutter with decision trees and patterns for every animation type. \n \n Covers five animation approaches: implicit animations (AnimatedContainer, AnimatedOpacity, TweenAnimationBuilder), explicit animations (AnimationController, Tween, AnimatedWidget/AnimatedBuilder), hero animations (shared element transitions), staggered animations (sequential/overlapping with Interval timing), and physics-based animations (spring, gravity, fling) \n Includes

Adaptive Flutter layouts that respond to screen size, platform, and input device across mobile, tablet, desktop, and web. \n \n Three-step workflow: abstract common widgets, measure available space with MediaQuery or LayoutBuilder, and branch UI based on width breakpoints (compact <600, medium 600–840, expanded ≥840) \n Covers layout fundamentals including Flutter's constraint system, common patterns (Row, Column, Expanded, Container), and responsive grid/navigation examples \n Best practic

Measure and optimize Flutter app bundle, APK, or IPA size with platform-specific analysis and reduction strategies. \n \n Supports Android (APK/AppBundle), iOS (IPA), and desktop platforms (Linux, macOS, Windows) with platform-specific measurement workflows \n Generates code size analysis JSON files via flutter build --analyze-size and integrates with Dart DevTools App Size Tool for component breakdown visualization \n Implements size reduction through debug info splitting, asset compression, an

Comprehensive testing framework for Flutter apps across unit, widget, and integration test layers. \n \n Covers three test categories: unit tests for isolated logic, widget tests for UI components, and integration tests for end-to-end flows on real devices or emulators \n Provides architectural testing patterns for ViewModels, Repositories, Services, and Views, with emphasis on Fake implementations over mocks for cleaner test design \n Includes plugin testing guidelines combining Dart tests with