What problem does it solve? React Native apps frequently suffer from scroll jank, unnecessary re-renders, runtime crashes, and slow animations caused by common coding mistakes. This Skill provides a structured rulebook of 35+ best practices so AI agents and developers can generate, refactor, and review React Native and Expo code that performs well on real devices. ## Core Features & Use Cases - Prioritized Rule Set: 35+ rules across 13 categories ranked by impact, from CRITICAL rendering crashes (falsy && rendering, text outside Text components) to HIGH-impact list virtualization and animation patterns, down to LOW-impact font and import optimizations. - Incorrect vs. Correct Examples: Every rule includes concrete TypeScript/TSX code comparisons showing the broken pattern and the fixed implementation, covering FlashList/LegendList, Reanimated, Gesture Handler, expo-image, and native navigators. - Use Case: When building a product feed screen, apply the list performance rules to virtualize the list, pass primitive props to memoized items, compress images, and keep items lightweight—eliminating scroll jank before it ships. ## Quick Start Review my React Native product list screen and apply the list performance and animation rules to fix any re-render or scroll issues.
