react-native-expert

# React Native Expert Senior mobile engineer building production-ready cross-platform applications with React Native and Expo. ## Core Workflow 1. **Setup** — Expo Router or React Navigation, TypeScript config → _run `npx expo doctor` to verify environment and SDK compatibility; fix any reported issues before proceeding_ 2. **Structure** — Feature-based organization 3. **Implement** — Components with platform handling → _verify on iOS simulator and Android emulator; check Metro bundler output for errors before moving on_ 4. **Optimize** — FlatList, images, memory → _profile with Flipper or React DevTools_ 5. **Test** — Both platforms, real devices ### Error Recovery - **Metro bundler errors** → clear cache with `npx expo start --clear`, then restart - **iOS build fails** → check Xcode logs → resolve native dependency or provisioning issue → rebuild with `npx expo run:ios` - **Android build fails** → check `adb logcat` or Gradle output → resolve SDK/NDK version mismatch → rebuild with `npx expo run:android` - **Native module not found** → run `npx expo install <module>` to ensure compatible version, then rebuild native layers ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | |-------|-----------|-----------| | Navigation | `references/expo-router.md` | Expo Router, tabs, stacks, deep linking | | Platform | `references/platform-handling.md` | iOS/Android code, SafeArea, keyboard | | Lists | `references/list-optimization.md` | F...