ReddRadar
Agent skill
jutsu-expo:expo-build
Use when building and deploying Expo apps with EAS Build. Covers build configuration, development builds, production builds, and app store submission.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/expo-build
SKILL.md
Expo Build with EAS
Use this skill when building and deploying Expo applications using EAS (Expo Application Services) Build.
Key Concepts
EAS Build Configuration
// eas.json
{
"cli": {
"version": ">= 5.9.0"
},
"build": {
"development": {
"developmentClient": true,
"distribution": "internal",
"ios": {
"simulator": true
}
},
"preview": {
"distribution": "internal"
},
"production": {
"autoIncrement": true
}
},
"submit": {
"production": {}
}
}
Build Commands
# Development build
eas build --profile development --platform ios
eas build --profile development --platform android
# Preview build
eas build --profile preview --platform all
# Production build
eas build --profile production --platform all
# Local build
eas build --profile production --platform ios --local
Development Builds
{
"build": {
"development": {
"developmentClient": true,
"distribution": "internal",
"env": {
"NODE_ENV": "development"
}
}
}
}
Best Practices
Environment Variables
// eas.json
{
"build": {
"production": {
"env": {
"APP_ENV": "production",
"API_URL": "https://api.myapp.com"
}
},
"staging": {
"env": {
"APP_ENV": "staging",
"API_URL": "https://staging-api.myapp.com"
}
}
}
}
Secrets Management
# Set secrets
eas secret:create --scope project --name API_KEY --value your_api_key
eas secret:create --scope project --name GOOGLE_SERVICES_JSON --value "$(cat google-services.json)" --type file
# List secrets
eas secret:list
# Use in eas.json
{
"build": {
"production": {
"env": {
"API_KEY": "$(EAS_SECRET_API_KEY)"
}
}
}
}
Version Management
// eas.json
{
"build": {
"production": {
"autoIncrement": true,
"ios": {
"buildNumber": "1"
},
"android": {
"versionCode": 1
}
}
}
}
Build Hooks
{
"build": {
"production": {
"prebuild": "npm run generate-assets",
"postbuild": "npm run cleanup"
}
}
}
Common Patterns
Multi-Environment Builds
// eas.json
{
"build": {
"development": {
"developmentClient": true,
"channel": "development",
"distribution": "internal"
},
"staging": {
"channel": "staging",
"distribution": "internal",
"ios": {
"bundleIdentifier": "com.myapp.staging"
},
"android": {
"package": "com.myapp.staging"
}
},
"production": {
"channel": "production",
"autoIncrement": true
}
}
}
Custom Native Code
{
"build": {
"production": {
"ios": {
"buildConfiguration": "Release"
},
"android": {
"gradleCommand": ":app:bundleRelease"
}
}
}
}
App Store Submission
# iOS
eas submit --platform ios
# Android
eas submit --platform android
# Configure submission
# eas.json
{
"submit": {
"production": {
"ios": {
"appleId": "your.apple.id@example.com",
"ascAppId": "1234567890",
"appleTeamId": "AB12CD34EF"
},
"android": {
"serviceAccountKeyPath": "./service-account.json",
"track": "production"
}
}
}
}
Build Monitoring
# View build status
eas build:list
# View specific build
eas build:view [build-id]
# Cancel build
eas build:cancel [build-id]
Anti-Patterns
Don't Commit Secrets
// Bad - Secrets in eas.json
{
"build": {
"production": {
"env": {
"API_KEY": "sk_live_1234567890"
}
}
}
}
// Good - Use EAS Secrets
eas secret:create --scope project --name API_KEY --value sk_live_1234567890
Don't Skip Version Increments
// Bad - Manual version management
{
"build": {
"production": {
"autoIncrement": false
}
}
}
// Good - Auto increment
{
"build": {
"production": {
"autoIncrement": true
}
}
}
Related Skills
- expo-config: Configuring app for builds
- expo-updates: OTA updates after builds
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