# Production

> Unit testing, performance optimization, security implementation, Play Store deployment.

- Skill: `majiayu000/production` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/production`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/production/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/production

---


# Production Quality Skill

## Quick Start

### Unit Testing
```kotlin
@Test
fun loadUser_updates_state() = runTest {
    val user = User(1, "John")
    val mockRepo = mockk<UserRepository>()
    coEvery { mockRepo.getUser(1) } returns user
    
    val viewModel = UserViewModel(mockRepo)
    viewModel.loadUser(1)
    
    assertEquals(user, viewModel.state.value)
}
```

### Security
```kotlin
// Encrypted storage
val prefs = EncryptedSharedPreferences.create(context, "secret",
    MasterKey.Builder(context).build(), AES256_SIV, AES256_GCM)

// SSL pinning
CertificatePinner.Builder()
    .add("api.example.com", "sha256/...").build()
```

### Play Store Deployment
```bash
./gradlew bundleRelease
# Upload to Google Play Console
# Monitor crashes and ratings
```

## Key Concepts

### Testing
- Unit tests (70-80% coverage)
- Integration tests
- UI tests with Espresso
- Mock external dependencies

### Performance
- ANR prevention
- Memory leak detection
- 60 FPS target
- Battery optimization

### Security
- Data encryption
- HTTPS/SSL pinning
- Permission handling
- OWASP Top 10

### Deployment
- Internal → Closed → Open → Production
- Staged rollout strategy
- Crash analytics monitoring
- User rating management

## Best Practices

✅ Write comprehensive tests
✅ Profile regularly
✅ Implement security features
✅ Monitor production apps
✅ Use staged rollouts

## Resources

- [Testing Guide](https://developer.android.com/training/testing)
- [Security & Privacy](https://developer.android.com/privacy-and-security)
- [Play Console Help](https://support.google.com/googleplay)