---
milestone: v6.0
audited: 2026-03-26
status: passed
scores:
  requirements: 13/13
  phases: 5/5
  integration: 12/12
  flows: 3/3
gaps:
  requirements: []
  integration: []
  flows: []
tech_debt:
  - phase: 08-checksum-spike
    items:
      - "SPIKE-02 overhead 13.5% (vs 10% nominal) — accepted for background seeder"
  - phase: 12-telemetry-heartbeat
    items:
      - "No dedicated unit tests for checksum.py check module and checksum_telemetry.py (consistent with existing heartbeat check pattern)"
      - "REQUIREMENTS.md traceability table shows 'Pending' while body checkboxes are [x] — cosmetic"
---

# Milestone v6.0 Audit: Data Integrity & Checksum Verification

## Requirements Coverage

| Requirement | Phase | Verification | Summary                                    | Status    |
| ----------- | ----- | ------------ | ------------------------------------------ | --------- |
| SPIKE-01    | 8     | passed       | PyO3 SHA-256 bindings callable from Python | satisfied |
| SPIKE-02    | 8     | passed       | 13.5% overhead (accepted)                  | satisfied |
| SPIKE-03    | 8     | passed       | 4 edge cases validated                     | satisfied |
| SEEDER-01   | 10    | passed       | Every Vision ZIP verified                  | satisfied |
| SEEDER-02   | 10    | passed       | 2 retries + LOUD alert                     | satisfied |
| SEEDER-03   | 10    | passed       | ChecksumRegistry persistence               | satisfied |
| SWEEP-01    | 11    | passed       | Full audit via ZIP re-download             | satisfied |
| SWEEP-02    | 11    | passed       | Incremental skip via registry              | satisfied |
| SWEEP-03    | 11    | passed       | Per-symbol pass/fail/skip report           | satisfied |
| TELEM-01    | 12    | passed       | Heartbeat checksum health section          | satisfied |
| TELEM-02    | 12    | passed       | LOUD alert via CRITICAL_KEYS               | satisfied |
| TELEM-03    | 9     | passed       | ChecksumRegistry JSON SSoT                 | satisfied |
| TELEM-04    | 12    | passed       | JSONL telemetry log + seeder/sweep wiring  | satisfied |

## Phase Verification Summary

| Phase | Name                        | Status | Must-Haves |
| ----- | --------------------------- | ------ | ---------- |
| 8     | Checksum Spike              | passed | 8/8        |
| 9     | Verification Registry       | passed | 4/4        |
| 10    | Seeder Checksum Integration | passed | 4/4        |
| 11    | Integrity Sweep             | passed | 3/3        |
| 12    | Telemetry & Heartbeat       | passed | 4/4        |

## Cross-Phase Integration

| From → To           | Connection                    | Status |
| ------------------- | ----------------------------- | ------ |
| Phase 8 → Phase 10  | PyO3 bindings used in seeder  | WIRED  |
| Phase 8 → Phase 11  | PyO3 bindings used in sweep   | WIRED  |
| Phase 9 → Phase 10  | ChecksumRegistry in seeder    | WIRED  |
| Phase 9 → Phase 11  | ChecksumRegistry in sweep     | WIRED  |
| Phase 9 → Phase 12  | ChecksumRegistry in heartbeat | WIRED  |
| Phase 12 → Phase 10 | Telemetry log in seeder       | WIRED  |
| Phase 12 → Phase 11 | Telemetry log in sweep        | WIRED  |

## E2E Flows

1. **Seeder Download → Verify → Registry → Telemetry** — Complete
2. **Sweep → Verify → Registry → Telemetry** — Complete
3. **Heartbeat → Registry + JSONL → Telegram** — Complete

## Tech Debt

- SPIKE-02: 13.5% overhead (HTTP round-trip for .CHECKSUM file). Acceptable for background seeder.
- No unit tests for heartbeat check module (consistent with existing pattern — no other check has tests)
- REQUIREMENTS.md traceability table "Pending" labels are cosmetic (body checkboxes correct)
