AugmentClaude
MITFrontendUI/UXMobile

React Native Best Practices

By vercel-labs· vercel-labs/agent-skills· 0

Build performant React Native apps with optimization and animation guidance.

Installation

  1. Make sure Claude is on your device and in your terminal.

    Skills load from ~/.claude/skills/ when Claude Code starts up — so you need it on your machine first. If you don't have it yet, install it once with the command below, then run claude in any terminal to verify.

    One-time setup
    npm i -g @anthropic-ai/claude-code

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When Claude uses it

React Native and Expo best practices for building performant mobile apps. Use when building React Native components, optimizing list performance, implementing animations, or working with native modules. Triggers on tasks involving React Native, Expo, mobile performance, or native platform APIs.

What this skill does

React Native Skills

Comprehensive best practices for React Native and Expo applications. Contains rules across multiple categories covering performance, animations, UI patterns, and platform-specific optimizations.

When to Apply

Reference these guidelines when:

  • Building React Native or Expo apps
  • Optimizing list and scroll performance
  • Implementing animations with Reanimated
  • Working with images and media
  • Configuring native modules or fonts
  • Structuring monorepo projects with native dependencies

Rule Categories by Priority

PriorityCategoryImpactPrefix
1List PerformanceCRITICALlist-performance-
2AnimationHIGHanimation-
3NavigationHIGHnavigation-
4UI PatternsHIGHui-
5State ManagementMEDIUMreact-state-
6RenderingMEDIUMrendering-
7MonorepoMEDIUMmonorepo-
8ConfigurationLOWfonts-, imports-

Quick Reference

1. List Performance (CRITICAL)

  • list-performance-virtualize - Use FlashList for large lists
  • list-performance-item-memo - Memoize list item components
  • list-performance-callbacks - Stabilize callback references
  • list-performance-inline-objects - Avoid inline style objects
  • list-performance-function-references - Extract functions outside render
  • list-performance-images - Optimize images in lists
  • list-performance-item-expensive - Move expensive work outside items
  • list-performance-item-types - Use item types for heterogeneous lists

2. Animation (HIGH)

  • animation-gpu-properties - Animate only transform and opacity
  • animation-derived-value - Use useDerivedValue for computed animations
  • animation-gesture-detector-press - Use Gesture.Tap instead of Pressable

3. Navigation (HIGH)

  • navigation-native-navigators - Use native stack and native tabs over JS navigators

4. UI Patterns (HIGH)

  • ui-expo-image - Use expo-image for all images
  • ui-image-gallery - Use Galeria for image lightboxes
  • ui-pressable - Use Pressable over TouchableOpacity
  • ui-safe-area-scroll - Handle safe areas in ScrollViews
  • ui-scrollview-content-inset - Use contentInset for headers
  • ui-menus - Use native context menus
  • ui-native-modals - Use native modals when possible
  • ui-measure-views - Use onLayout, not measure()
  • ui-styling - Use StyleSheet.create or Nativewind

5. State Management (MEDIUM)

  • react-state-minimize - Minimize state subscriptions
  • react-state-dispatcher - Use dispatcher pattern for callbacks
  • react-state-fallback - Show fallback on first render
  • react-compiler-destructure-functions - Destructure for React Compiler
  • react-compiler-reanimated-shared-values - Handle shared values with compiler

6. Rendering (MEDIUM)

  • rendering-text-in-text-component - Wrap text in Text components
  • rendering-no-falsy-and - Avoid falsy && for conditional rendering

7. Monorepo (MEDIUM)

  • monorepo-native-deps-in-app - Keep native dependencies in app package
  • monorepo-single-dependency-versions - Use single versions across packages

8. Configuration (LOW)

  • fonts-config-plugin - Use config plugins for custom fonts
  • imports-design-system-folder - Organize design system imports
  • js-hoist-intl - Hoist Intl object creation

How to Use

Read individual rule files for detailed explanations and code examples:

rules/list-performance-virtualize.md
rules/animation-gpu-properties.md

Each rule file contains:

  • Brief explanation of why it matters
  • Incorrect code example with explanation
  • Correct code example with explanation
  • Additional context and references

Full Compiled Document

For the complete guide with all rules expanded: AGENTS.md

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