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Performance and architecture patterns for React Native + Expo apps. Rules ranked by impact — fix CRITICAL before touching MEDIUM.

Structured performance optimization reference for React Native apps covering FPS, bundle size, TTI, and memory. \n \n Organized into 9 JavaScript/React guides (profiling, lists, animations, memory), 9 native optimization guides (Turbo Modules, threading, profiling), and 9 bundling guides (tree shaking, code splitting, size analysis) \n Each reference follows a hybrid format with quick patterns/commands, impact ratings (CRITICAL/HIGH/MEDIUM), and deep-dive explanations with prerequisites and comm

Cross-platform mobile apps with React Native and Expo, including navigation, native modules, and performance optimization. \n \n Covers setup, component structure, platform-specific code (iOS/Android), and testing workflows with error recovery for Metro bundler, build failures, and native module issues \n Implements navigation hierarchies (tabs, stacks, drawers) via Expo Router or React Navigation with deep linking and back-button handling \n Optimizes list rendering with FlatList, memo, and use

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Expert skill for building high-performance native executables from Java applications using GraalVM Native Image, dramatically reducing startup time and memory consumption.

Orchestrates React Native version upgrades with template diffs, dependency resolution, and native platform migration. \n \n Applies canonical rn-diff-purge template diffs to align native iOS and Android configuration with target React Native versions \n Handles package.json dependency updates, CocoaPods and Gradle changes, and breaking API migrations across major and minor version bumps \n Includes Expo SDK upgrade layer for managed Expo projects and post-upgrade verification checklist \n Provid

Production-ready React Native patterns with Expo, navigation, offline-first architecture, and native module integration. \n \n Covers Expo Router for file-based navigation, authentication flows with secure token storage, and route protection patterns \n Includes offline-first data sync using React Query with AsyncStorage persistence and online status detection \n Demonstrates native module integration for haptics, biometrics, push notifications, and platform-specific code patterns \n Provides pe

Guidelines for building high-quality Expo React Native applications with JavaScript, focusing on clean code, modularity, and performance.

Comprehensive performance optimization guide for Expo React Native applications. Contains 42 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

Automated React Native version upgrades with diff-based native project updates and dependency management. \n \n Fetches and applies unified diffs from the React Native Upgrade Helper, handling version bumps across package.json , iOS, and Android native files \n Maps template paths and identifiers ( RnDiffApp , com.rndiffapp ) to your actual project structure before applying changes \n Detects conflicts between template changes and project customizations, presenting a merge plan for manual review