React Native Patterns Agent Skill

by cosmicstack-labs

Navigation, state management, native modules, performance, animations, and cross-platform strategies

489 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

365

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/cosmicstack-labs/mercury-agent-skills --skill react-native-patterns

The instruction itself

8 sections, as written by the author

React Native Patterns

Build performant cross-platform mobile apps with React Native.

Architecture

Project Structure

src/
├── components/    # Reusable UI components
├── screens/       # Screen-level components
├── navigation/    # React Navigation config
├── services/      # API, storage, native modules
├── hooks/         # Custom hooks
├── store/         # State management
├── utils/         # Helpers
└── types/         # TypeScript types

// Stack + Tab pattern
const RootStack = createNativeStackNavigator();
const MainTabs = createBottomTabNavigator();

function App() {
  return (
    <NavigationContainer>
      <RootStack.Navigator>
        <RootStack.Screen name="Main" component={MainTabs} />
        <RootStack.Screen name="Details" component={DetailsScreen} />
      </RootStack.Navigator>
    </NavigationContainer>
  );
}

Performance

Key Optimizations

React.memo for pure components
useMemo/useCallback for expensive computations
FlatList with getItemLayout for perf
Image caching with react-native-fast-image
Hermes engine for Android
Remove console.logs in production

Native Modules

Use Turbo Modules (New Architecture) for bridging:

// NativeModule.ts
import { TurboModuleRegistry } from 'react-native';
export default TurboModuleRegistry.getEnforcing('MyCustomModule');

Cross-Platform Strategy

Write once, customize per platform with .ios.tsx/.android.tsx extensions
Use Platform.select for minor differences
Test on both platforms before every release

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How to use it

Copy the folder

Take cosmicstack-labs/react-native-patterns from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.