# 20. Architecture Checklist

| Category | Item | Status |
|----------|------|--------|
| **Core Architecture** | | |
| | High-level architecture diagram | ✅ |
| | Technology stack justified | ✅ |
| | Data flow documented | ✅ |
| | Scalability considered | ✅ |
| **Data Layer** | | |
| | Database schema defined | ✅ |
| | Relationships documented | ✅ |
| | Indexes identified | ✅ |
| | Migration strategy | ✅ |
| **API Design** | | |
| | API contracts defined | ✅ |
| | Input validation | ✅ |
| | Error responses standardized | ✅ |
| | Authentication/Authorization | ✅ |
| **Frontend** | | |
| | Component architecture | ✅ |
| | State management | ✅ |
| | Routing strategy | ✅ |
| | Error boundaries | ✅ |
| **Security** | | |
| | Authentication flow | ✅ |
| | Input sanitization | ✅ |
| | CORS/CSP headers | ✅ |
| | Secrets management | ✅ |
| **Performance** | | |
| | Caching strategy | ✅ |
| | Database optimization | ✅ |
| | Bundle optimization | ✅ |
| | Loading states | ✅ |
| **DevOps** | | |
| | CI/CD pipeline | ✅ |
| | Docker configuration | ✅ |
| | Environment separation | ✅ |
| | Deployment strategy | ✅ |
| **Observability** | | |
| | Logging strategy | ✅ |
| | Health checks | ✅ |
| | Metrics collection | ✅ |
| | Error tracking | ✅ |

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