Cross-Platform Development Guidelines

React Native Development

• Use React Native 0.72+ with modern features
• Use functional components with Hooks
• Use TypeScript for type safety
• Implement proper navigation with React Navigation
• Use Redux, MobX, or Zustand for state management
• Follow React Native best practices
• Use Expo for rapid prototyping when appropriate

Flutter Development

• Use Flutter 3.16+ with Dart 3.0+
• Use StatefulWidget and StatelessWidget appropriately
• Use Provider, Riverpod, or Bloc for state management
• Implement proper navigation with Navigator 2.0
• Follow Flutter best practices and widget composition
• Use Flutter DevTools for debugging
• Leverage pub.dev for packages

Cross-Platform Architecture Patterns

• MVVM: Use with reactive state management
• BLoC Pattern: Use with Flutter for business logic
• Clean Architecture: Separate layers properly
• Repository Pattern: Abstract data sources
• Implement proper dependency injection
• Separate business logic from UI code
• Use shared code for business logic

Native Module Integration

• Create native modules for platform-specific features
• Use React Native Native Modules for iOS/Android
• Use Flutter Platform Channels for native communication
• Implement proper error handling across platforms
• Maintain consistent APIs across platforms
• Use platform-specific optimizations when needed
• Document native module interfaces

Cross-Platform State Management

• React Native: Redux, MobX, Zustand, Context API
• Flutter: Provider, Riverpod, Bloc, GetX
• Implement proper state persistence
• Use immutable state patterns
• Handle async operations properly
• Use middleware for side effects
• Implement proper state hydration

Cross-Platform Navigation

• React Native: React Navigation (Stack, Tab, Drawer)
• Flutter: Navigator 2.0, GoRouter, AutoRoute
• Implement deep linking properly
• Handle back button behavior correctly
• Use type-safe navigation when possible
• Implement proper route guards
• Handle navigation state persistence

Performance Optimization for Cross-Platform Apps

• Use React Native Hermes for JavaScript engine
• Use Flutter's performance best practices
• Implement proper list virtualization
• Optimize image loading and caching
• Use code splitting and lazy loading
• Profile performance with platform tools
• Reduce bundle size with tree shaking
• Use efficient data structures

Platform-Specific Code Handling

• Use platform-specific file extensions (.ios.tsx, .android.tsx)
• Use conditional platform checks (Platform.OS, Theme.of)
• Implement platform-specific UI components
• Handle platform-specific permissions correctly
• Use platform-specific APIs when needed
• Maintain consistent behavior across platforms
• Document platform-specific differences