# Vercel React Native Skills

> 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.

Source: https://skillsagentes.com/skills/vercel-labs/agent-skills/vercel-react-native-skills
Repository: https://github.com/vercel-labs/agent-skills
Author: vercel-labs
License: MIT
Updated: hace 6 meses
Context cost: 74 tok installed, 1.1k tok once triggered, 39.8k tok with every bundled file
Bundle: 42 files, 155 KB
Permissions requested: none declared

## Install

```bash
npx -y skills add vercel-labs/agent-skills --skill react-native-skills --agent claude-code
```

## What it does

- Aplica buenas prácticas de React Native y Expo por categoría: rendimiento de listas, animaciones, navegación, UI, estado, renderizado, monorepo y configuración
- Sugiere reglas concretas como usar FlashList, expo-image, Pressable, native stack navigators y useDerivedValue
- Remite a archivos de reglas individuales en rules/ con ejemplos de código correcto e incorrecto

## Use it when

- Construir apps React Native o Expo
- Optimizar rendimiento de listas y scroll
- Implementar animaciones con Reanimated
- Trabajar con imágenes, fuentes, módulos nativos o proyectos monorepo con dependencias nativas

## What triggers it

- "Optimiza el rendimiento de esta lista en React Native"
- "¿Cómo animo este componente con Reanimated?"
- "Ayúdame a estructurar mi monorepo de Expo con dependencias nativas"
- "Revisa mis componentes de UI en React Native siguiendo buenas prácticas"

## Files

- AGENTS.md — 72 KB
- README.md — 5 KB
- SKILL.md — 4 KB
- metadata.json — 896 B
- rules/_sections.md — 2 KB
- rules/_template.md — 631 B
- rules/animation-derived-value.md — 1 KB
- rules/animation-gesture-detector-press.md — 2 KB
- rules/animation-gpu-properties.md — 2 KB
- rules/design-system-compound-components.md — 2 KB
- rules/fonts-config-plugin.md — 1 KB
- rules/imports-design-system-folder.md — 1 KB
- rules/js-hoist-intl.md — 2 KB
- rules/list-performance-callbacks.md — 1 KB
- rules/list-performance-function-references.md — 4 KB
- rules/list-performance-images.md — 1 KB
- rules/list-performance-inline-objects.md — 2 KB
- rules/list-performance-item-expensive.md — 2 KB
- rules/list-performance-item-memo.md — 2 KB
- rules/list-performance-item-types.md — 3 KB
- rules/list-performance-virtualize.md — 2 KB
- rules/monorepo-native-deps-in-app.md — 1 KB
- rules/monorepo-single-dependency-versions.md — 1 KB
- rules/navigation-native-navigators.md — 5 KB
- rules/react-compiler-destructure-functions.md — 1 KB
- rules/react-compiler-reanimated-shared-values.md — 1 KB
- rules/react-state-dispatcher.md — 2 KB
- rules/react-state-fallback.md — 2 KB
- rules/react-state-minimize.md — 2 KB
- rules/rendering-no-falsy-and.md — 2 KB
- rules/rendering-text-in-text-component.md — 697 B
- rules/scroll-position-no-state.md — 2 KB
- rules/state-ground-truth.md — 2 KB
- rules/ui-expo-image.md — 2 KB
- rules/ui-image-gallery.md — 2 KB
- rules/ui-measure-views.md — 2 KB
- rules/ui-menus.md — 4 KB
- rules/ui-native-modals.md — 2 KB
- rules/ui-pressable.md — 1 KB
- rules/ui-safe-area-scroll.md — 2 KB
- rules/ui-scrollview-content-inset.md — 1 KB
- rules/ui-styling.md — 2 KB

## SKILL.md

Reproduced verbatim from vercel-labs/agent-skills under MIT. This section is the upstream document and is in English.

# 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

| Priority | Category         | Impact   | Prefix               |
| -------- | ---------------- | -------- | -------------------- |
| 1        | List Performance | CRITICAL | `list-performance-`  |
| 2        | Animation        | HIGH     | `animation-`         |
| 3        | Navigation       | HIGH     | `navigation-`        |
| 4        | UI Patterns      | HIGH     | `ui-`                |
| 5        | State Management | MEDIUM   | `react-state-`       |
| 6        | Rendering        | MEDIUM   | `rendering-`         |
| 7        | Monorepo         | MEDIUM   | `monorepo-`          |
| 8        | Configuration    | LOW      | `fonts-`, `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`

---

Skills Agentes — https://skillsagentes.com/skills/vercel-labs/agent-skills/vercel-react-native-skills