---
phase: 08-stack-upgrade-backend-decomposition
verified: 2026-06-17T11:15:00Z
status: passed
score: 6/6 v0.2 requirements verified
overrides_applied: 0
sources:
  - 08-VALIDATION.md
  - 08-UAT.md
  - 08-SECURITY.md
  - 08-01-SUMMARY.md
  - 08-02-SUMMARY.md
  - 08-03-SUMMARY.md
  - 08-04-SUMMARY.md
  - 08-05-SUMMARY.md
  - 08-06-SUMMARY.md
  - 08-07-SUMMARY.md
  - 08-08-SUMMARY.md
---

# Phase 8: Stack Upgrade & Backend Decomposition Verification Report

**Phase Goal:** Split the largest backend and frontend modules into focused packages without changing public routes, client imports, auth behavior, storage invariants, or test outcomes.

**Status:** passed

## Goal Achievement

| Requirement | Status | Evidence |
|---|---|---|
| CODE-01 | VERIFIED | Admin router decomposed into `backend/api/admin/`; `08-VALIDATION.md` maps this to `pytest tests/test_admin_api.py -x`; Phase 8 UAT confirms all admin endpoints preserve route paths and access controls. |
| CODE-02 | VERIFIED | Documents router decomposed into `backend/api/documents/`; `08-VALIDATION.md` maps this to `pytest tests/test_documents.py -x`; Phase 8 UAT confirms upload/list/detail/delete workflow passes. |
| CODE-03 | VERIFIED | Auth router decomposed into `backend/api/auth/`; `08-VALIDATION.md` maps this to `pytest tests/test_auth.py -x`; Phase 8 UAT confirms register/login/refresh/logout and session revocation. |
| CODE-04 | VERIFIED | Frontend API client split into domain modules while preserving `client.js` barrel exports; Phase 8 UAT confirms cloud connection API consumers still work with zero consumer-file churn. |
| CODE-08 | VERIFIED | Shared schemas/validators extracted; `CloudConnectionOut` is defined once in `backend/api/schemas.py`; `08-SECURITY.md` records duplicate-definition and credential-leak checks as closed. |
| PERF-01 | VERIFIED | Frontend dependency stack upgraded; Phase 8 UAT recorded Vite 6.4.3 build success, and milestone remediation later moved Vite to 8.0.16 to clear the 2026 esbuild high-severity audit finding. |

## Required Artifacts

| Artifact | Status | Notes |
|---|---|---|
| `08-VALIDATION.md` | VERIFIED | `nyquist_compliant: true`; all Phase 8 requirements covered by automated commands or static checks. |
| `08-UAT.md` | VERIFIED | 7/7 UAT checks passed, including cold start, auth, document management, admin, cloud storage, session revocation, and Vite build. |
| `08-SECURITY.md` | VERIFIED | `threats_open: 0`; 45/45 threats closed or accepted. |
| Plan summaries 08-01 through 08-08 | VERIFIED | All implementation summaries exist and provide traceable completion evidence. |

## Behavioral Spot-Checks

| Check | Evidence | Status |
|---|---|---|
| Backend route regression | `08-VALIDATION.md`: admin/documents/auth targeted suites pass; combined URL regression suite records 58 passed. | PASS |
| Full backend suite | `08-VALIDATION.md`: `pytest -v` recorded 405 passed, 6 skipped, 7 xfailed. | PASS |
| Frontend smoke | `08-VALIDATION.md`: `npm test` recorded 136/136 passed. | PASS |
| Production build | `08-UAT.md`: original Phase 8 build produced `frontend/dist/` with exit 0; milestone remediation re-ran the current Vite 8 build successfully. | PASS |

## Security Review

Phase 8 security is already verified by `08-SECURITY.md`:

- Admin sub-router handlers retain `Depends(get_current_admin)`.
- Document endpoints preserve owner checks and filename/path-separator validation.
- Auth sub-router preserves refresh rotation, session revocation, JTI/fingerprint behavior, and audit logging.
- Frontend client split keeps tokens in Pinia memory only.
- No new unmanaged supply-chain risk remains open.

## Gaps Summary

No Phase 8 verification gaps remain.

_Verified: 2026-06-17T11:15:00Z_
_Verifier: Codex (milestone audit remediation)_