---
phase: 08-nyquist-validation-track
plan: 02
subsystem: validation-audit
tags: [nyquist, audit, phase-2, driver-management, validation]
requires:
  - phase: 08-01
    provides: "Phase 1 Nyquist Record pattern + evidence-lookup methodology"
provides:
  - "Phase 2 Nyquist Record (6 rows, all pass) in .planning/phases/02-driver-management/02-VALIDATION.md"
  - "Phase 2 nyquist_compliant=true audited 2026-04-13"
  - "Formal closure of POST /drivers/upload 500 historical gap via Phase 9 / UX-01 fixing commits"
affects:
  - .planning/phases/02-driver-management/02-VALIDATION.md
tech_stack:
  added: []
  patterns:
    - "Nyquist Record audit table reused from 08-01: # | Criterion | Observable Check | Evidence | Status | Notes"
    - "Historical gap-closure citation pattern: record fail-fix-v1.1 gap but resolve as pass when fixing phase has already shipped"
key_files:
  created:
    - .planning/phases/08-nyquist-validation-track/08-02-SUMMARY.md
  modified:
    - .planning/phases/02-driver-management/02-VALIDATION.md
decisions:
  - "Derived 6 rows: one per DRV-0x success criterion from v1.0-ROADMAP.md Phase 2 (DRV-01..05 = rows 1-5), plus row 6 for the mandatory POST /drivers/upload 500 historical gap per CONTEXT.md locked decision."
  - "Row 6 resolved PASS (not fail-fix-v1.1) because Phase 9 Plan 01 UX-01 was already Complete in REQUIREMENTS.md at audit time — the plan explicitly permits this closure pattern. Cited fixing commits d1de839 (RED tests), 10ee09a (handler fix), 72c6a98 (printer_form wiring)."
  - "nyquist_compliant flipped to true because all 6 rows are pass; no deferred/wont-do/fail rows."
  - "Cross-referenced all 5 DRV-0x criteria against 02-VERIFICATION.md's 14 observable truths (14/14 verified 2026-04-10) to keep evidence traceable to the original verifier run."
metrics:
  tasks_completed: 1
  tasks_total: 1
  duration_minutes: 4
  completed_date: 2026-04-13
requirements_completed: []
---

# Phase 08 Plan 02: Phase 2 Nyquist Audit Summary

**One-liner:** Audited Phase 2 (Driver Management, DRV-01..05) against Nyquist rules and upgraded `02-VALIDATION.md` in place with a 6-row Nyquist Record where every DRV-0x success criterion maps to exactly one observable pytest check, plus a formal row closing the Phase 8 kickoff-surfaced `POST /drivers/upload` HTTP 500 historical gap via Phase 9 / UX-01 fixing commits.

## What Shipped

- `.planning/phases/02-driver-management/02-VALIDATION.md` now contains a `## Nyquist Record` section (placed above Validation Sign-Off, below Manual-Only Verifications).
- 6 rows: one per DRV-0x success criterion (5) + one historical-gap closure row for the POST /drivers/upload 500 defect.
- Every row has a non-empty Observable Check cell (pytest invocation) and a non-empty Evidence cell citing committed tests, source paths, commit SHAs, and the dated 02-VERIFICATION.md run.
- Row 6 formally records the POST /drivers/upload 500 defect reported 2026-04-13 during Phase 8 kickoff, links it to Phase 9 / UX-01, and closes it as `pass` citing the fixing commits `d1de839` (RED tests), `10ee09a` (handler caller-branch fix), and `72c6a98` (printer_form.html wiring).
- Frontmatter updated: `nyquist_compliant: false → true`, added `nyquist_audited: 2026-04-13`, `nyquist_auditor: Claude (gsd-executor, plan 08-02)`.
- All historical sections (Test Infrastructure, Sampling Rate, Per-Task Verification Map, Wave 0 Requirements, Manual-Only Verifications, Validation Sign-Off) preserved verbatim.

## Audit Outcome

| Status | Count |
|--------|-------|
| pass | 6 |
| fail-fix-v1.1 | 0 |
| deferred-v1.2 | 0 |
| wont-do | 0 |

Phase 2 is Nyquist-compliant. Zero gaps carry forward into 08-08 (rollup). The POST /drivers/upload 500 is recorded as a historical-gap row resolved in Phase 9.

## Evidence Strategy Used

Priority order from CONTEXT.md was honored:
1. **Test evidence** (preferred): used for all 6 rows — `tests/test_driver_upload.py` (test_upload_valid_zip, test_upload_non_zip, test_upload_no_inf, test_drivers_page, test_upload_returns_select, test_driver_persisted, test_dedup_upload, test_unused_files_in_response, test_upload_500_regression, test_upload_oob_*) and `tests/test_inf_parser.py` (16 tests).
2. **Commit/file-line evidence**: cited alongside tests for source-of-truth — `imptune/api/drivers.py`, `imptune/services/inf_parser.py`, `imptune/storage/driver_store.py`, `imptune/templates/partials/driver_list.html`. Commits cited: 290106d, 5056922 (02-01 RED/GREEN), c648fc5 (02-02), and d1de839 + 10ee09a + 72c6a98 (Phase 9 / UX-01 fix).
3. **Dated manual-check evidence**: 02-VERIFICATION.md (2026-04-10, 14/14 observable truths verified) referenced in Notes columns for cross-traceability.

No row relied on "code looks right" — every check is an actual pytest invocation.

## Cross-Reference with 02-VERIFICATION.md

`02-VERIFICATION.md` (dated 2026-04-10) already enumerated 14 observable truths split across plans 02-01 (7 truths on the INF parser) and 02-02 (7 truths on the upload endpoint + UI). The Nyquist Record maps:

- Row 1 (DRV-01) ← 02-VERIFICATION.md rows 8 + 10
- Row 2 (DRV-02) ← 02-VERIFICATION.md rows 1-7
- Row 3 (DRV-03) ← 02-VERIFICATION.md rows 9 + 14
- Row 4 (DRV-04) ← 02-VERIFICATION.md rows 11 + 12
- Row 5 (DRV-05) ← 02-VERIFICATION.md rows 5 + 13
- Row 6 (historical gap) ← Phase 9 / UX-01 09-01-SUMMARY.md (new evidence, post-dates 02-VERIFICATION.md)

This keeps the two documents 1:1 alignable for rows 1-5.

## Deviations from Plan

**None.** Plan 08-02 executed exactly as written. Single task, single file edit.

Minor interpretive choice (within plan latitude, step 6 explicitly allowing this): row 6 was recorded as `pass` citing Phase 9 UX-01 fixing commits rather than `fail-fix-v1.1`. The plan's Task 1 step 6 anticipates this exact case — "if UX-01 is complete, cite the fixing commit and flip status accordingly". UX-01 is marked Complete in REQUIREMENTS.md, so the historical gap is recorded in the Notes column but closed as `pass`. Same precedent established in 08-01 row 14 (Phase 1 spike → Phase 10 RTVAL-01 close).

## Authentication Gates

None.

## Self-Check: PASSED

- `.planning/phases/02-driver-management/02-VALIDATION.md` — FOUND (modified)
- `## Nyquist Record` heading — FOUND in file
- `nyquist_audited:` frontmatter key — FOUND in file
- `drivers/upload` reference — FOUND in file (row 6 of Nyquist Record)
- Commit `dff5a9c` — FOUND in `git log`
- No source code files touched (plan constraint) — only `.planning/phases/02-driver-management/02-VALIDATION.md` modified
