Ampli-Group Mobile Development
Stack
Expo 54, React Native 0.81, expo-router (file-based routing), Tamagui v4 (UI), TypeScript strict mode.
Local Build Prerequisites
Required to run expo run:android or expo prebuild:
| Requirement | Check | Install |
|---|---|---|
| Java JDK 17 | java -version (must show 17.x) |
brew install openjdk@17 |
| Android SDK | echo $ANDROID_HOME (must be set) |
mise run install |
If expo run:android fails with a Java error:
brew install openjdk@17
export JAVA_HOME="$(brew --prefix openjdk@17)/libexec/openjdk.jdk/Contents/Home"
export PATH="$JAVA_HOME/bin:$PATH"
If expo run:android fails with ANDROID_HOME not set or SDK not found:
export ANDROID_HOME="$HOME/Library/Android/sdk"
export PATH="$ANDROID_HOME/emulator:$ANDROID_HOME/platform-tools:$PATH"
Both are set permanently by mise run install. If missing, re-run it or add to ~/.zshrc manually.
iOS builds require Xcode (App Store). No additional toolchain needed beyond Xcode.
Imports
Use @/ path alias for project root: @/lib/supabase, @/lib/posthog.
UI Components
Use Tamagui components with shorthand props. Never use raw React Native View/Text.
// ✅
import { YStack, XStack, Text, Button, Card, Spinner, ScrollView } from 'tamagui';
<YStack gap="$4" p="$4">
<Text fos="$6" fow="bold">Title</Text>
<Button>Action</Button>
</YStack>
// ❌
import { View, Text } from 'react-native';
Common shorthand: bg (background), p/px/py (padding), m/mt (margin), br (borderRadius), bw (borderWidth), boc (borderColor), fos (fontSize), fow (fontWeight), col (color), ai (alignItems), jc (justifyContent), gap, elevate, bordered.
Routing
File-based via expo-router:
app/_layout.tsx— layout wrappers (Stack, Tabs)app/index.tsx— home screenapp/settings.tsx— named route
Use Stack with headerShown: false (current convention).
New Screen
import { YStack, Text } from 'tamagui';
export default function MyScreen() {
return (
<YStack f={1} ai="center" jc="center" bg="$background">
<Text>My Screen</Text>
</YStack>
);
}
Supabase
import { supabase } from '@/lib/supabase';
Single shared client. Uses EXPO_PUBLIC_SUPABASE_URL and EXPO_PUBLIC_SUPABASE_PUBLISHABLE_KEY.
Theme
Default theme is dark. TamaguiProvider wraps the app in _layout.tsx with defaultTheme="dark".
Environment Variables
All public config uses EXPO_PUBLIC_* prefix. Access via process.env.EXPO_PUBLIC_*.