القائمة
Specifies best practices and conventions for Expo-based mobile app development.
يُحدَّد Prompt الذي يراجع المصدر أولًا بشكل افتراضي. يمكنك التبديل إلى أمر مباشر أو تنزيل نسخة محلية.
اقرأ SKILL.md وأي ملفات مرافقة يعرضها SkillsMP قبل أن تقرر التثبيت.
التثبيت باستخدام Codex أو Claude انسخ هذا Prompt والصقه في Codex أو Claude أو مساعد آخر ليراجع صفحة Skill ويثبّتها لك.
يتجاوز الأمر المباشر Prompt المخصّص للمراجعة. افحص المصدر قبل تشغيله.
npx skills add https://github.com/oimiragieo/agent-studio --skill expo-mobile-app-ruleيبقى الأمر في سطر واحد. مرّر أفقيًا لمراجعته كاملًا قبل النسخ.
تفضّل نسخة محلية؟ نزّل الملفات المتاحة حاليًا لدى SkillsMP.
Agent frontmatter enhancements — disallowedTools, mcpServers scoping, fork_eligible field
Context management — pre-compact persistence, threshold alignment, microcompact/circuit breaker detection
Hook enhancements — updatedInput for bash safety prefixes, suppressOutput for verbose blocks, denial-based routing feedback
عرض SKILL.md
استنادا إلى تصنيف SOC المهني
| name | expo-mobile-app-rule |
| description | Specifies best practices and conventions for Expo-based mobile app development. |
| version | 1.0.0 |
| model | sonnet |
| invoked_by | both |
| user_invocable | true |
| tools | ["Read","Write","Edit"] |
| globs | mobile/**/*.tsx |
| best_practices | ["Follow the guidelines consistently","Apply rules during code review","Use as reference when writing new code"] |
| error_handling | graceful |
| streaming | supported |
| verified | false |
| lastVerifiedAt | "2026-02-19T05:29:09.098Z" |
| source | builtin |
| trust_score | 100 |
| provenance_sha | bd10d0827cce556e |
Expo Router uses the file system for navigation:
app/
_layout.tsx # Root layout
index.tsx # Home screen (/)
(tabs)/ # Tab navigator group
_layout.tsx # Tab layout
home.tsx # /home
profile.tsx # /profile
user/
[id].tsx # Dynamic route /user/:id
modal.tsx # Can be presented as modal
// app/_layout.tsx
import { Stack } from 'expo-router';
export default function RootLayout() {
return (
<Stack>
<Stack.Screen name="(tabs)" options={{ headerShown: false }} />
<Stack.Screen
name="modal"
options={{
presentation: 'modal',
title: 'Settings',
}}
/>
</Stack>
);
}
// app/(tabs)/_layout.tsx
import { } ;
{ } ;
() {
(
);
}
import { useRouter, useLocalSearchParams, Link } from 'expo-router';
function MyComponent() {
const router = useRouter();
const params = useLocalSearchParams();
return (
<>
{/* Declarative navigation */}
<Link href="/profile">Go to Profile</Link>
<Link href={{ pathname: '/user/[id]', params: { id: '123' } }}>
View User
</Link>
{/* Imperative navigation */}
<Button onPress={() => router.push('/profile')} title="Push" />
<Button onPress={() => router.replace('/home')} title="Replace" />
<Button onPress={() => router.back()} title="Go Back" />
</>
);
}
// app/user/[id].tsx
import { useLocalSearchParams } from 'expo-router';
export default function UserScreen() {
const { id } = useLocalSearchParams<{ id: string }>();
return <Text>User ID: {id}</Text>;
}
// app/_layout.tsx
import { useAuth } from '@/hooks/useAuth';
import { Redirect, Slot } from 'expo-router';
export default function AppLayout() {
const { user, loading } = useAuth();
if (loading) {
return <LoadingScreen />;
}
if (!user) {
return <Redirect href="/login" />;
}
return <Slot />;
}
// contexts/AppContext.tsx
import { createContext, useContext, useState, ReactNode } from 'react';
interface AppState {
user: User | null;
theme: 'light' | 'dark';
setUser: (user: User | null) => void;
setTheme: (theme: 'light' | 'dark') => void;
}
const AppContext = createContext<AppState | undefined>(undefined);
export function AppProvider({ children }: { children: ReactNode }) {
const [user, setUser] = useState<User | null>(null);
const [theme, setTheme] = useState<'light' | 'dark'>('light');
return (
<AppContext.Provider value={{ user, theme, setUser, setTheme }}>
{children}
</AppContext.Provider>
);
}
export const useApp = () => {
const context = useContext(AppContext);
if (!context) {
throw new Error('useApp must be used within AppProvider');
}
return context;
};
// store/slices/userSlice.ts
import { createSlice, PayloadAction } from '@reduxjs/toolkit';
interface UserState {
currentUser: User | null;
loading: boolean;
}
const userSlice = createSlice({
name: 'user',
initialState: { currentUser: null, loading: false } as UserState,
reducers: {
setUser: (state, action: PayloadAction<User | null>) => {
state.currentUser = action.payload;
},
setLoading: (state, action: PayloadAction<boolean>) => {
state.loading = action.payload;
},
},
});
export const { setUser, setLoading } = userSlice.actions;
export default userSlice.reducer;
// store/useStore.ts
import { create } from 'zustand';
import { persist, createJSONStorage } from 'zustand/middleware';
import AsyncStorage from '@react-native-async-storage/async-storage';
interface AppStore {
user: User | null;
theme: 'light' | 'dark';
setUser: (user: User | null) => void;
toggleTheme: () => void;
}
export const useStore = create<AppStore>()(
persist(
set => ({
user: null,
theme: 'light',
setUser: user => set({ user }),
toggleTheme: () =>
set(state => ({
theme: state.theme === 'light' ? 'dark' : 'light',
})),
}),
{
name: 'app-storage',
storage: createJSONStorage(() => AsyncStorage),
}
)
);
import AsyncStorage from '@react-native-async-storage/async-storage';
// Save data
await AsyncStorage.setItem('user', JSON.stringify(user));
// Load data
const userData = await AsyncStorage.getItem('user');
const user = userData ? JSON.parse(userData) : null;
// Remove data
await AsyncStorage.removeItem('user');
// Clear all
await AsyncStorage.clear();
import * as SQLite from 'expo-sqlite';
class DatabaseService {
private db: SQLite.SQLiteDatabase | null = null;
async init() {
this.db = await SQLite.openDatabaseAsync('myapp.db');
await this.db.execAsync(`
CREATE TABLE IF NOT EXISTS messages (
id INTEGER PRIMARY KEY AUTOINCREMENT,
text TEXT NOT NULL,
timestamp INTEGER,
synced INTEGER DEFAULT 0
);
`);
}
async saveMessage(text: string) {
await this.db?.runAsync(
'INSERT INTO messages (text, timestamp) VALUES (?, ?)',
text,
Date.now()
);
}
async getUnsynced() {
return await this.db?.getAllAsync('SELECT * FROM messages WHERE synced = 0');
}
async markSynced(id: number) {
await this.db?.runAsync('UPDATE messages SET synced = 1 WHERE id = ?', id);
}
}
import NetInfo from '@react-native-community/netinfo';
import { useEffect, useState } from 'react';
function useOnlineStatus() {
const [isOnline, setIsOnline] = useState(true);
useEffect(() => {
const unsubscribe = NetInfo.addEventListener((state) => {
setIsOnline(state.isConnected ?? false);
});
return () => unsubscribe();
}, []);
return isOnline;
}
// Usage
function MyScreen() {
const isOnline = useOnlineStatus();
return (
<View>
{!isOnline && <Banner message="You are offline" />}
{/* Rest of content */}
</View>
);
}
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
function useOfflineData() {
const queryClient = useQueryClient();
const isOnline = useOnlineStatus();
const { data } = useQuery({
queryKey: ['items'],
queryFn: fetchItems,
enabled: isOnline,
// Use cached data when offline
staleTime: Infinity,
});
const mutation = useMutation({
mutationFn: createItem,
onMutate: async newItem => {
// Optimistic update
await queryClient.cancelQueries({ queryKey: ['items'] });
const previous = queryClient.getQueryData(['items']);
queryClient.setQueryData(['items'], (old: any) => [...old, newItem]);
// Save to local storage if offline
if (!isOnline) {
await saveToQueue(newItem);
}
return { previous };
},
onError: (err, newItem, context) => {
// Rollback on error
queryClient.setQueryData(['items'], context?.previous);
},
});
// Sync queue when online
useEffect(() => {
if (isOnline) {
syncQueue();
}
}, [isOnline]);
return { data, mutation };
}
import * as Notifications from 'expo-notifications';
import * as Device from 'expo-device';
import Constants from 'expo-constants';
import { Platform } from 'react-native';
// Configure notification handler
Notifications.setNotificationHandler({
handleNotification: async () => ({
shouldShowAlert: true,
shouldPlaySound: true,
shouldSetBadge: true,
}),
});
async function registerForPushNotifications() {
if (!Device.isDevice) {
alert('Push notifications only work on physical devices');
return;
}
const { status: existingStatus } = await Notifications.getPermissionsAsync();
let finalStatus = existingStatus;
if (existingStatus !== 'granted') {
const { status } = await Notifications.requestPermissionsAsync();
finalStatus = status;
}
if (finalStatus !== 'granted') {
return;
}
const projectId = Constants.expoConfig?.extra?.eas?.projectId;
const token = await Notifications.getExpoPushTokenAsync({ projectId });
// Send token to your backend
await sendTokenToBackend(token.data);
// Android-specific channel setup
if (Platform.OS === 'android') {
Notifications.setNotificationChannelAsync('default', {
name: 'default',
importance: Notifications.AndroidImportance.MAX,
vibrationPattern: [0, 250, 250, 250],
lightColor: '#FF231F7C',
});
}
return token.data;
}
import { useEffect, useRef } from 'react';
function useNotifications() {
const notificationListener = useRef<Notifications.Subscription>();
const responseListener = useRef<Notifications.Subscription>();
useEffect(() => {
// Foreground notification handler
notificationListener.current = Notifications.addNotificationReceivedListener(notification => {
console.log('Notification received:', notification);
});
// User interaction handler
responseListener.current = Notifications.addNotificationResponseReceivedListener(response => {
const data = response.notification.request.content.data;
// Navigate based on notification data
if (data.screen) {
router.push(data.screen as any);
}
});
return () => {
if (notificationListener.current) {
Notifications.removeNotificationSubscription(notificationListener.current);
}
if (responseListener.current) {
Notifications.removeNotificationSubscription(responseListener.current);
}
};
}, []);
}
async function scheduleNotification() {
await Notifications.scheduleNotificationAsync({
content: {
title: 'Reminder',
body: 'Time to check your tasks!',
data: { screen: '/tasks' },
},
trigger: {
seconds: 60,
// Or use specific date
// date: new Date(Date.now() + 60 * 60 * 1000),
// Or repeating
// repeats: true,
},
});
}
// Cancel notification
const identifier = await scheduleNotification();
await Notifications.cancelScheduledNotificationAsync(identifier);
// Cancel all
await Notifications.cancelAllScheduledNotificationsAsync();
// app.json
{
"expo": {
"scheme": "myapp",
"ios": {
"associatedDomains": ["applinks:myapp.com"]
},
"android": {
"intentFilters": [
{
"action": "VIEW",
"autoVerify": true,
"data": [
{
"scheme": "https",
"host": "myapp.com"
}
],
"category": ["BROWSABLE", "DEFAULT"]
}
]
}
}
}
// Expo Router handles deep links automatically
// myapp://user/123 -> app/user/[id].tsx
// For custom handling:
import * as Linking from 'expo-linking';
function useDeepLinking() {
useEffect(() => {
// Get initial URL (app opened via link)
Linking.getInitialURL().then(url => {
if (url) {
handleDeepLink(url);
}
});
// Listen for URL changes (app already open)
const subscription = Linking.addEventListener('url', ({ url }) => {
handleDeepLink(url);
});
return () => subscription.remove();
}, []);
}
function handleDeepLink(url: string) {
const { path, queryParams } = Linking.parse(url);
// Navigate based on path
if (path === 'user') {
router.push(`/user/${queryParams?.id}`);
}
}
// apple-app-site-association (serve at https://myapp.com/.well-known/)
{
"applinks": {
"apps": [],
"details": [
{
"appID": "TEAMID.com.company.myapp",
"paths": ["/user/*", "/post/*"]
}
]
}
}
// assetlinks.json (serve at https://myapp.com/.well-known/)
[
{
"relation": ["delegate_permission/common.handle_all_urls"],
"target": {
"namespace": "android_app",
"package_name": "com.company.myapp",
"sha256_cert_fingerprints": ["FINGERPRINT"]
}
}
]
// When sending push notification from backend
{
"to": "ExponentPushToken[xxx]",
"title": "New Message",
"body": "You have a new message",
"data": {
"url": "myapp://chat/123"
}
}
// Handle in app
responseListener.current =
Notifications.addNotificationResponseReceivedListener((response) => {
const url = response.notification.request.content.data.url;
if (url) {
Linking.openURL(url);
}
});
import { memo, useMemo, useCallback } from 'react';
const ListItem = memo(({ item, onPress }: Props) => (
<TouchableOpacity onPress={() => onPress(item.id)}>
<Text>{item.title}</Text>
</TouchableOpacity>
));
function MyList({ items }: Props) {
const sortedItems = useMemo(
() => items.sort((a, b) => a.title.localeCompare(b.title)),
[items]
);
const handlePress = useCallback((id: string) => {
router.push(`/item/${id}`);
}, []);
return (
<FlatList
data={sortedItems}
renderItem={({ item }) => (
<ListItem item={item} onPress={handlePress} />
)}
keyExtractor={(item) => item.id}
/>
);
}
import { FlashList } from '@shopify/flash-list';
<FlashList
data={items}
renderItem={({ item }) => <ItemCard item={item} />}
estimatedItemSize={100}
// Much faster than FlatList for large lists
/>
import { Image } from 'expo-image';
<Image
source={{ uri: 'https://example.com/large-image.jpg' }}
placeholder={require('./placeholder.png')}
contentFit="cover"
transition={200}
cachePolicy="memory-disk"
style={{ width: 300, height: 200 }}
/>
Before starting:
cat .claude/context/memory/learnings.md
After completing: Record any new patterns or exceptions discovered.
ASSUME INTERRUPTION: Your context may reset. If it's not in memory, it didn't happen.