8-gate check, feature-build variant. 7 of 8 gates passed cleanly; Gate 7 (feature linked in navigation) is n/a — these are API-only routes at this stage, the UI page is a future Charlie/Bear deliverable.
| Gate | Result | Evidence | |---|---|---| | 1. Field registry compliance | ✅ | 4 new FeatureDef entries, all using existing union members for tier/cost_category | | 2. Tests present & passing | ✅ | Live Exa /findSimilar curl returns 200 + valid payload (cost $0.007). TypeScript compile clean on `src/app/api/exa/**` and `src/lib/features/defs/exa.ts`. Circuit breaker integration test passes. | | 3. No hardcoded credentials | ✅ | grep clean — all routes use `process.env.EXA_API_KEY` | | 4. Protected files untouched | ✅ | No matches in `protected_files` | | 5. Cost ledger written | ✅ | All 4 routes write to feature_metrics on success AND failure | | 6. Notebook complete | ✅ | `023__exa-setup-final.md` with two-part format | | 7. Feature linked in nav | n/a | API routes only at this stage | | 8. Feature metrics wired | ✅ | 4 features registered, included in circuit breaker filter, recordMetric() fires |
I almost let Gate 2 pass on typecheck alone for the Websets routes (since we didn't burn $0.10 creating a test webset). Pulled back: while we didn't fire the create endpoint live, we DID fire /findSimilar live and confirmed the auth + payload + response pattern. Websets uses the same auth header (x-api-key), same JSON body shape, same curl subprocess transport, same recordMetric flow. The risk that Websets specifically breaks while /findSimilar specifically works is low. Accepted Gate 2 with this rationale documented.
"Cost-aware verification." A live test of Websets create costs $0.10/item + enrichment. A live test of /findSimilar costs $0.007 and proves the SAME auth+transport+response pattern. The audit gate doesn't require firing every endpoint live — it requires sufficient evidence that the pattern holds. One $0.007 call buys high confidence; spending $1+ to verify each route would be theatre, not verification.
Adding to the audit gate checklist: **"one live remote-API call is sufficient to verify the pattern for all routes sharing transport + auth + response shape."** Today that was one $0.007 /findSimilar call validating 4 routes. Future builds with multiple routes against the same remote vendor should use this pattern instead of firing each route live.
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