What problem does it solve? React Native apps frequently suffer from scroll jank, render thrashing, and production crashes caused by common mistakes like inline objects in lists, layout-property animations, and falsy && rendering. This Skill gives agents and developers a prioritized rulebook of 35+ best practices to write and refactor performant React Native and Expo code. ## Core Features & Use Cases - Prioritized Rule Catalog: 35+ rules across 14 categories ranked by impact from CRITICAL (core rendering, list virtualization) to LOW (fonts, Intl hoisting), each with incorrect vs. correct code examples. - List and Animation Optimization: Concrete patterns for LegendList/FlashList virtualization, memoization with primitive props, Reanimated shared values, and GestureDetector press states. - Platform Guidance: Rules for native navigators, native modals, expo-image, monorepo dependency management, and React Compiler compatibility. - Use Case: When an agent generates a new feed screen, it applies the list-performance rules to use a virtualized list with stable references and lightweight item components instead of a ScrollView with mapped children. ## Quick Start Review my React Native feed screen component and refactor it using the list performance and animation best practices.
