---
phase: 03-api-layer
verified: 2026-02-24T21:15:00Z
status: passed
score: 10/10 must-haves verified
re_verification: false
---

# Phase 3: API Layer Verification Report

**Phase Goal:** Admin-authenticated HTTP endpoints expose health status, alerts, and processing analytics; existing service processors emit analytics instrumentation
**Verified:** 2026-02-24T21:15:00Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | GET /admin/health returns current health status for all four services when called by admin | VERIFIED | `admin.ts:24-62` — Promise.all over SERVICE_NAMES=['document_ai','llm_api','supabase','firebase_auth'], maps null results to `status:'unknown'` |
| 2 | GET /admin/analytics returns processing summary (uploads, success/failure, avg time) for a configurable time range | VERIFIED | `admin.ts:69-96` — validates `?range=` against `/^\d+[hd]$/`, calls `getAnalyticsSummary(range)`, returns `{ totalUploads, succeeded, failed, successRate, avgProcessingMs }` |
| 3 | GET /admin/alerts returns active alert events | VERIFIED | `admin.ts:102-117` — calls `AlertEventModel.findActive()`, returns envelope |
| 4 | POST /admin/alerts/:id/acknowledge marks an alert as acknowledged | VERIFIED | `admin.ts:123-150` — calls `AlertEventModel.acknowledge(id)`, returns 404 on not-found, 500 on other errors |
| 5 | Non-admin authenticated users receive 404 on all admin endpoints | VERIFIED | `requireAdmin.ts:21-30` — returns `res.status(404).json({ error: 'Not found' })` if email does not match; router-level middleware applies to all routes |
| 6 | Unauthenticated requests receive 401 on admin endpoints | VERIFIED | `firebaseAuth.ts:102-104` — returns 401 before `requireAdminEmail` runs; `verifyFirebaseToken` is second in the router middleware chain |
| 7 | Document processing emits upload_started event after job is marked as processing | VERIFIED | `jobProcessorService.ts:137-142` — `recordProcessingEvent({ event_type: 'upload_started' })` called after `markAsProcessing`, before timeout setup |
| 8 | Document processing emits completed event with duration_ms after job succeeds | VERIFIED | `jobProcessorService.ts:345-351` — `recordProcessingEvent({ event_type: 'completed', duration_ms: processingTime })` called after `markAsCompleted` |
| 9 | Document processing emits failed event with duration_ms and error_message when job fails | VERIFIED | `jobProcessorService.ts:382-392` — `recordProcessingEvent({ event_type: 'failed', duration_ms, error_message })` in catch block with `if (job)` null-guard |
| 10 | Analytics instrumentation does not change existing processing behavior or error handling | VERIFIED | All three calls are void fire-and-forget (no await, no try/catch wrapper); confirmed 0 occurrences of `await recordProcessingEvent`; existing code paths unchanged |

**Score:** 10/10 truths verified

---

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `backend/src/middleware/requireAdmin.ts` | Admin email check middleware returning 404 for non-admin; exports `requireAdminEmail` | VERIFIED | 33 lines; exports `requireAdminEmail`; reads env vars inside function body; fail-closed pattern; no stubs |
| `backend/src/routes/admin.ts` | Admin router with 4 endpoints; exports default Router | VERIFIED | 153 lines; 4 route handlers (`GET /health`, `GET /analytics`, `GET /alerts`, `POST /alerts/:id/acknowledge`); default export; fully implemented |
| `backend/src/services/analyticsService.ts` | `getAnalyticsSummary` and `AnalyticsSummary` export; uses `getPostgresPool()` | VERIFIED | Exports `AnalyticsSummary` interface (line 95) and `getAnalyticsSummary` function (line 115); uses `getPostgresPool()` (line 117); parameterized SQL with `$1::interval` cast |
| `backend/src/services/jobProcessorService.ts` | `recordProcessingEvent` import + 3 instrumentation call sites | VERIFIED | Import at line 6; 4 occurrences total (1 import + 3 call sites at lines 138, 346, 385); 0 `await` uses |
| `backend/src/index.ts` | `app.use('/admin', adminRoutes)` mount | VERIFIED | Import at line 15; mount at line 184 |

---

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `backend/src/routes/admin.ts` | `backend/src/middleware/requireAdmin.ts` | `router.use(requireAdminEmail)` | WIRED | `admin.ts:3` imports; `admin.ts:18` applies as router middleware |
| `backend/src/routes/admin.ts` | `backend/src/models/HealthCheckModel.ts` | `HealthCheckModel.findLatestByService()` | WIRED | `admin.ts:5` imports; `admin.ts:27` calls `findLatestByService(name)` in Promise.all |
| `backend/src/routes/admin.ts` | `backend/src/services/analyticsService.ts` | `getAnalyticsSummary(range)` | WIRED | `admin.ts:7` imports; `admin.ts:82` calls with validated range |
| `backend/src/index.ts` | `backend/src/routes/admin.ts` | `app.use('/admin', adminRoutes)` | WIRED | Import at line 15; mount at line 184 |
| `backend/src/services/jobProcessorService.ts` | `backend/src/services/analyticsService.ts` | `recordProcessingEvent()` | WIRED | Import at line 6; 3 call sites at lines 138, 346, 385 — no await |

---

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|----------|
| INFR-02 | 03-01 | Admin API routes protected by Firebase Auth with admin email check | SATISFIED | `verifyFirebaseToken` + `requireAdminEmail` applied as router-level middleware in `admin.ts:16-18`; unauthenticated gets 401, non-admin gets 404 |
| HLTH-01 | 03-01 | Admin can view live health status (healthy/degraded/down) for all four services | SATISFIED | `GET /admin/health` queries `HealthCheckModel.findLatestByService` for `['document_ai','llm_api','supabase','firebase_auth']`; null results map to `status:'unknown'` |
| ANLY-02 | 03-01, 03-02 | Admin can view processing summary: upload counts, success/failure rates, avg processing time | SATISFIED | `GET /admin/analytics` returns `{ totalUploads, succeeded, failed, successRate, avgProcessingMs }` via aggregate SQL; `jobProcessorService.ts` emits real events to populate the table |

All three requirement IDs declared across plans are accounted for.

**Cross-reference against REQUIREMENTS.md traceability table:** INFR-02, HLTH-01, and ANLY-02 are all mapped to Phase 3 in `REQUIREMENTS.md:89-91`. No orphaned requirements — all Phase 3 requirements are claimed and verified.

---

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| `backend/src/services/jobProcessorService.ts` | 448 | `TODO: Implement statistics method in ProcessingJobModel` inside `getStatistics()` | Info | Pre-existing stub in `getStatistics()` — method is not called anywhere in the codebase and is not part of Phase 03 plan artifacts. No impact on phase goal. |

No blocker or warning-level anti-patterns found in Phase 03 modified files. The one TODO is in a pre-existing orphaned method unrelated to this phase.

---

### Human Verification Required

None. All must-haves are verifiable programmatically for this phase.

The following items would require human verification only when consuming the API from Phase 4 (frontend):
- Visual rendering of health status badges
- Alert acknowledgement flow in the admin dashboard UI
- Analytics chart display

These are Phase 4 concerns, not Phase 3.

---

### Summary

Phase 3 goal is fully achieved. All ten observable truths are verified at all three levels (exists, substantive, wired).

**Plan 03-01 (Admin API endpoints):** All four endpoints are implemented with real logic, properly authenticated behind `verifyFirebaseToken + requireAdminEmail`, mounted at `/admin` in `index.ts`, and using the `{ success, data, correlationId }` response envelope consistently. The `requireAdminEmail` middleware correctly returns 404 (not 403) per the locked design decision.

**Plan 03-02 (Analytics instrumentation):** Three `recordProcessingEvent()` call sites are present at the correct lifecycle points in `processJob()`. All calls are void fire-and-forget with no `await`, preserving the non-blocking contract. The null-guard on `job` in the catch block prevents runtime errors when `findById` throws before assignment.

The two plans together deliver the complete analytics pipeline: events are now written to `document_processing_events` by the processor, and `GET /admin/analytics` reads them via aggregate SQL.

Commits 301d0bf, 4169a37, and dabd4a5 verified present in git history with correct content.

---

_Verified: 2026-02-24T21:15:00Z_
_Verifier: Claude (gsd-verifier)_