Why a Checklist Helps
Frontend system design often fails in predictable ways: unclear boundaries, weak caching strategy, and no observability plan. A checklist forces explicit decisions early.
Architecture Checklist
- Bounded feature modules with explicit dependencies
- Shared UI primitives separated from product features
- API adapter layer to isolate backend changes
- State strategy documented per feature (server state vs client state)
Performance Checklist
- Route-level code splitting enabled
- Image optimization pipeline defined
- Critical rendering path measured on target devices
- Performance budgets set in CI
Reliability Checklist
- Error boundaries for major UI surfaces
- Graceful fallback states for network and auth failures
- Retry policy defined per endpoint type
- Monitoring alerts mapped to user-impacting flows
Delivery Checklist
- Testing pyramid balanced (unit, integration, e2e)
- Rollback plan documented for releases
- Feature flags for high-risk launches
- Analytics events reviewed for naming consistency
Security and Accessibility Checklist
- Content Security Policy reviewed
- Input sanitization strategy documented
- Keyboard and screen reader support verified for core flows
- Color contrast and focus indicators validated
Closing Takeaway
System design quality is rarely about a single brilliant choice. It comes from complete coverage of trade-offs. Use the checklist in architecture reviews and release readiness meetings.
