React Native and Expo best practices for performant mobile apps across list rendering, animations, navigation, and native modules.

• Covers eight rule categories prioritized by impact: list performance (FlashList, memoization, callback stability), animations (GPU properties, derived values), navigation, UI patterns, state management, rendering, monorepo structure, and configuration
• List performance rules address critical concerns like virtualizing large lists, optimizing images, and avoiding inline objects that trigger unnecessary re-renders
• Animation guidance focuses on GPU-accelerated properties (transform, opacity) and Reanimated patterns; navigation recommends native stack and tab navigators over JavaScript alternatives
• Includes rules for modern UI patterns: expo-image for all images, Pressable over TouchableOpacity, native modals, and safe area handling in ScrollViews