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 prioritized rule set that guides AI agents and developers to write performant, crash-free React Native and Expo code from the start. ## Core Features & Use Cases - Prioritized Rule Set: 35+ rules across 13 categories ranked by impact, from CRITICAL rendering rules (avoiding falsy && crashes) to LOW-priority font and import optimizations. - Incorrect vs. Correct Examples: Every rule includes side-by-side code comparisons showing the broken pattern and the fixed implementation with explanations. - List and Animation Optimization: Detailed guidance on virtualized lists (LegendList, FlashList), Reanimated shared values, GestureDetector press states, and memoization strategies. - Use Case: When building a feed screen with FlashList, apply the list performance rules to pass primitive props, hoist callbacks, and use item types so scrolling stays smooth even with hundreds of items. ## Quick Start Review my React Native list component and apply the performance rules from this skill to eliminate re-renders and scroll jank.
