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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

React Native component library with Uniwind styling, semantic variants, and compound component patterns. \n \n Built on Uniwind (Tailwind CSS for React Native) with HSL color format; do not apply web HeroUI patterns or colors \n Includes accessible, customizable components (Button, Card, TextField, Dialog) using compound component structure accessed via dot notation \n Provides semantic variants (primary, secondary, tertiary, danger, ghost, outline) that adapt to light/dark themes via CSS variab

Create robust cross-platform mobile applications using React Native with modern development patterns including navigation, state management, API integration, and native module handling.

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

Write and review React Native component tests using Testing Library v13 and v14. \n \n Covers render patterns, screen queries (getBy/getAllBy/queryBy/findBy variants), Jest matchers, userEvent interactions, fireEvent, and async patterns with version-specific behavior \n Automatically detects your project's RNTL version (v13 for React 18, v14 for React 19+) and applies correct API signatures and sync/async rules \n Provides query priority guidance (getByRole first), interaction best practices (us

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

sentry-react-native-sdk

Build smooth 60fps animations combining Reanimated 3, Gesture Handler, and layout transitions. \n \n Master Reanimated's shared values, animated styles, and timing functions (withSpring, withTiming, withDecay) for declarative animations \n Handle complex gestures like pan, pinch, and rotation using Gesture Handler, then synchronize them with animations via shared values \n Implement entering/exiting animations and layout transitions using FadeIn, FadeOut, and Layout.springify() for dynamic lists

Embed native Android, iOS, or macOS views and web content directly into Flutter applications. \n \n Supports two Android composition modes (Hybrid and Texture Layer) with distinct performance and fidelity tradeoffs; iOS and macOS use Hybrid Composition exclusively \n Includes step-by-step workflows for implementing platform views on Android and iOS, with validation and troubleshooting guidance \n Enables embedding Flutter into existing web applications via Full Page or Multi-view (Embedded) mode