GSTACK MULTI-LAYER REVIEW: FEATURE READY FOR SHIP

CEO LAYER → SCOPE & IMPACT
Feature scope → Matches sprint goal (✓)
Stakeholder alignment → Confirmed with marketing, support (✓)
Metrics → Tracked in analytics (✓)
Risk level → Low, feature flag in place (✓)
Ship go-no-go → GO, proceed to next layer

ENGINEERING LAYER → CODE QUALITY & PERF
Issues found → 2 blocking, 3 nice-to-have
BLOCKING:
  1. Missing null check on user.preferences (line 47) → Crash risk
  2. Database query N+1 pattern → 3x slower on 1k users
NICE-TO-HAVE:
  3. Error message vague ("Failed") → Unclear to users
  4. No deprecation warning on old endpoint
  5. Type inference could be more specific
Performance → Worse than target by 12% on cold start
Code review → BLOCKED until null check + query optimization fixed

DESIGN LAYER → UX & ACCESSIBILITY
Issues found → 1 blocking, 2 minor
BLOCKING:
  1. Button contrast ratio 3.2:1 → WCAG AA requires 4.5:1
MINOR:
  2. Mobile layout test → Works, but margin feels tight on 320px
  3. Hover state missing on disabled button (desktop)
Design sign-off → BLOCKED until contrast ratio fixed

QA LAYER → TEST COVERAGE
Unit tests → 82% coverage (target 80%, good)
Integration tests → Edge cases missing:
  • Concurrent user updates → Race condition possible
  • Empty state rendering → Not tested
Functional test → Happy path works, 3 error paths untested
Suggested → Add 2 more tests before merge (30 min effort)

SECURITY LAYER
Input validation → Sufficient (rate limit + sanitize)
Auth check → Correct (user_id derived from session)
Data exposure → None (scoped query by user_id)
Risk → LOW

SHIP DECISION: BLOCKED
Required fixes → Null check (5 min), DB query (15 min), contrast ratio (5 min)
Estimated wait → 1 hour
Re-review → Post-fix, quick approval expected
Alternative → Disable feature in dark mode, ship with flag OFF (not recommended)