---
phase: 08-nyquist-validation-track
plan: 03
subsystem: validation-audit
tags: [nyquist, audit, phase-3, printer-configuration, validation]
requires:
  - phase: 08-02
    provides: "Phase 2 Nyquist Record pattern + historical-gap closure methodology"
provides:
  - "Phase 3 Nyquist Record (10 rows, all pass) in .planning/phases/03-printer-configuration/03-VALIDATION.md"
  - "Phase 3 nyquist_compliant=true audited 2026-04-13"
  - "Formal closure of PRNT-03 Alpine.js IP->port live-browser gap via Phase 9 / UX-02 fixing commits"
affects:
  - .planning/phases/03-printer-configuration/03-VALIDATION.md
tech_stack:
  added: []
  patterns:
    - "Nyquist Record audit table reused from 08-01 / 08-02: # | Criterion | Observable Check | Evidence | Status | Notes"
    - "Historical gap-closure citation pattern: third application (Phase 1 spike->RTVAL-01, drivers/upload 500->UX-01, PRNT-03 Alpine->UX-02)"
key_files:
  created:
    - .planning/phases/08-nyquist-validation-track/08-03-SUMMARY.md
  modified:
    - .planning/phases/03-printer-configuration/03-VALIDATION.md
decisions:
  - "Derived 10 rows: one per PRNT-0x success criterion from v1.0-ROADMAP.md Phase 3 (PRNT-01..10). No extra historical-gap rows beyond the PRNT-03 criterion itself (no new kickoff-surfaced defects for Phase 3)."
  - "Row 3 (PRNT-03) resolved PASS (not fail-fix-v1.1) because Phase 9 Plan 02 UX-02 was already Complete in REQUIREMENTS.md at audit time. Cited fixing commits 322fc20 (Playwright e2e test) and 37a06da (plan 09-02 completion docs). Precedent from 08-01 row 14 and 08-02 row 6."
  - "nyquist_compliant flipped to true because all 10 rows are pass; no deferred/wont-do/fail rows."
  - "Cross-referenced all 10 PRNT-0x criteria against 03-VERIFICATION.md's 10 observable truths (9 VERIFIED + 1 NEEDS HUMAN on Truth 2 which maps to PRNT-03) — the only 'needs human' truth from v1.0 is precisely the one resolved via Phase 9 / UX-02 Playwright."
  - "PRNT-10 row recorded as pass citing the Phase-3-scoped deliverable (detail page + driver FK intact + placeholder button). Full regeneration workflow is a Phase 4 deliverable and out of scope for Phase 3 Nyquist."
metrics:
  tasks_completed: 1
  tasks_total: 1
  duration_minutes: 5
  completed_date: 2026-04-13
requirements_completed: []
---

# Phase 08 Plan 03: Phase 3 Nyquist Audit Summary

**One-liner:** Audited Phase 3 (Printer Configuration, PRNT-01..10) against Nyquist rules and upgraded `03-VALIDATION.md` in place with a 10-row Nyquist Record where every PRNT-0x success criterion maps to exactly one observable check, including the PRNT-03 Alpine.js IP->port criterion whose live-browser verification gap is closed via Phase 9 / UX-02 Playwright fixing commits.

## What Shipped

- `.planning/phases/03-printer-configuration/03-VALIDATION.md` now contains a `## Nyquist Record` section (placed above Validation Sign-Off, below Manual-Only Verifications).
- 10 rows: one per PRNT-0x success criterion. No extra historical-gap rows needed for Phase 3 — the PRNT-03 Alpine.js gap is not separate from PRNT-03 itself, so it is recorded as the PRNT-03 row's status + Notes rather than a bonus row (compare 08-02 which needed a row-6 bonus for the `POST /drivers/upload` 500 defect that wasn't a DRV-0x criterion).
- Every row has a non-empty Observable Check cell (pytest invocation or Playwright e2e invocation) and a non-empty Evidence cell citing committed tests, source paths, commit SHAs, and the dated 03-VERIFICATION.md run.
- Row 3 (PRNT-03) formally records the Alpine.js IP->port live-browser verification gap flagged 2026-04-10 in 03-VERIFICATION.md as `NEEDS HUMAN`, links it to Phase 9 / UX-02, and closes it as `pass` citing fixing commits `322fc20` (Playwright e2e test) and `37a06da` (plan 09-02 completion docs).
- Frontmatter updated: `nyquist_compliant: false -> true`, added `nyquist_audited: 2026-04-13`, `nyquist_auditor: Claude (gsd-executor, plan 08-03)`.
- 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 | 10 |
| fail-fix-v1.1 | 0 |
| deferred-v1.2 | 0 |
| wont-do | 0 |

Phase 3 is Nyquist-compliant. Zero gaps carry forward into 08-08 (rollup). The PRNT-03 live-browser verification gap is recorded as a historical gap resolved in Phase 9 / UX-02.

## Evidence Strategy Used

Priority order from CONTEXT.md was honored:
1. **Test evidence** (preferred): used for 9 of 10 rows via `tests/test_printer_crud.py` (test_create_printer_persisted, test_create_printer_duplex, test_create_printer_color_mode, test_create_printer_paper_size, test_create_printer_collate, test_printer_survives_page_refresh, test_printer_grouped_by_client, test_printer_detail_shows_driver, test_printer_detail_no_driver). Row 3 uses e2e evidence via `tests/e2e/test_port_autofill.py` (Playwright headless chromium).
2. **Commit/file-line evidence**: cited alongside tests for source-of-truth — `imptune/api/printers.py`, `imptune/api/pages.py`, `imptune/templates/partials/printer_form.html`, `imptune/templates/partials/printer_list.html`, `imptune/templates/printer_detail.html`, `imptune/db/models.py`. Commits cited: 356c2ee (03-01 Phase 3 CRUD), 322fc20 + 37a06da (Phase 9 UX-02 Playwright fix).
3. **Dated manual-check evidence**: 03-VERIFICATION.md (2026-04-10, 9/10 VERIFIED + 1 NEEDS HUMAN on PRNT-03) referenced in Notes columns for cross-traceability. The single NEEDS HUMAN row is exactly the one resolved via row 3's Phase 9 / UX-02 closure.

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

## Cross-Reference with 03-VERIFICATION.md

`03-VERIFICATION.md` (dated 2026-04-10) enumerated 10 observable truths covering PRNT-01..10. The Nyquist Record maps:

- Row 1 (PRNT-01) <- 03-VERIFICATION.md Truth 1 (form fields + persistence)
- Row 2 (PRNT-02) <- 03-VERIFICATION.md Truth 1 (ip_address field)
- Row 3 (PRNT-03) <- 03-VERIFICATION.md Truth 2 (NEEDS HUMAN -> resolved via Phase 9 / UX-02 Playwright)
- Row 4 (PRNT-04) <- 03-VERIFICATION.md PRNT-04 coverage row
- Row 5 (PRNT-05) <- 03-VERIFICATION.md PRNT-05 coverage row
- Row 6 (PRNT-06) <- 03-VERIFICATION.md PRNT-06 coverage row
- Row 7 (PRNT-07) <- 03-VERIFICATION.md PRNT-07 coverage row
- Row 8 (PRNT-08) <- 03-VERIFICATION.md Truth 3 + 4 (grouped-by-client)
- Row 9 (PRNT-09) <- 03-VERIFICATION.md Truth 4 (persistence across refresh)
- Row 10 (PRNT-10) <- 03-VERIFICATION.md Truths 6 + 7 + 8 (detail page + driver FK + placeholder button)

This keeps the two documents 1:1 alignable — and notably the single v1.0-era `NEEDS HUMAN` truth is exactly the PRNT-03 row that Phase 9 / UX-02 closed.

## Deviations from Plan

**None.** Plan 08-03 executed exactly as written. Single task, single file edit.

Minor interpretive choice (within plan latitude, Task 1 step 4 explicitly allowing this): row 3 was recorded as `pass` citing Phase 9 UX-02 fixing commits rather than `fail-fix-v1.1`. The plan's Task 1 step 4 anticipates this exact case — "Per CONTEXT.md this was a known UX gap absorbed into Phase 9 / UX-02 (now Complete). Cite the Phase 9 fix commit if available". UX-02 is marked Complete in REQUIREMENTS.md, so the historical gap is recorded in the Notes column but closed as `pass`. Third application of the precedent established in 08-01 (row 14 Phase 1 spike -> Phase 10 RTVAL-01) and 08-02 (row 6 drivers/upload 500 -> Phase 9 UX-01).

## Authentication Gates

None.

## Self-Check: PASSED

- `.planning/phases/03-printer-configuration/03-VALIDATION.md` — FOUND (modified)
- `## Nyquist Record` heading — FOUND in file
- `nyquist_audited:` frontmatter key — FOUND in file
- `PRNT-03` Alpine.js row present with Phase 9 / UX-02 citation — FOUND in file
- Commit `3f03b35` — FOUND in `git log`
- No source code files touched (plan constraint) — only `.planning/phases/03-printer-configuration/03-VALIDATION.md` modified