feat(01-13): wave-1 — promote c647f61 prototype to production paths; A6 GREEN

Move the three load-bearing prototype files from `tests/uat/prototype/`
to their production paths under `tests/uat/`, leaving the architectural
narrative (research findings, BLOCKER citations, falsification table
references) intact. No behavioral changes — A6 still PASSES 5/5 in ~7s
end-to-end from the new paths.

File moves (git mv preserves history):
  - tests/uat/prototype/extension-page-harness.html
      → tests/uat/extension-page-harness.html
  - tests/uat/prototype/extension-page-harness.ts
      → tests/uat/extension-page-harness.ts
  - tests/uat/prototype/a6.test.ts
      → tests/uat/a6.test.ts

The `tests/uat/prototype/` directory is now empty (git does not track
empty directories; will not appear in subsequent `git status`).

Path-reference updates inside the moved files:
  - tests/uat/extension-page-harness.html: `<p>` line referencing the
    chrome-extension:// URL updated to drop `/prototype/`.
  - tests/uat/extension-page-harness.ts: file-header docstring rewritten
    to cite Plan 01-13 / Approach B / inheritance from c647f61. The
    load-bearing architectural-finding comment block (MV3 SW dynamic-
    import block falsification, Approach-B chrome.* surface summary)
    is REWORDED but its semantic content + research citations are
    PRESERVED — every load-bearing fact survives the rename.
  - tests/uat/a6.test.ts:
      * File-header rewritten to position the file as Plan 01-13's
        standalone single-assertion entry point (preserves the future-
        proof rationale: this entry stays around forever for fast TDD
        iteration on A6 even after Wave 3 folds A6 into the orchestrator
        harness.test.ts).
      * REPO_ROOT resolvePath chain corrected from `..,..,..` to `..,..`
        — the file is now two directory levels above the repo root
        instead of three. Without this fix DIST_TEST_DIR would resolve
        to a path one level above the actual repo root and
        assertBundlePresent would throw. **VERIFIED by running the
        driver: build path resolves correctly.**
      * harnessUrl constant updated to drop `/prototype/` from the
        chrome-extension://<id>/tests/uat/extension-page-harness.html
        URL — must match the rollup emission path in dist-test/.
      * Stdout labels updated: 'PROTOTYPE A6 result' → 'A6 result',
        'Plan 01-11 PROTOTYPE — A6 ... feasibility test' → 'Plan 01-13
        — A6 (Bug B canonical) standalone driver'. Inside the docstrings
        the historical 'originally landed as 01-11 prototype' provenance
        is preserved per the plan's contract.

vite.test.config.ts:
  - `rollupOptions.input` renamed `prototype_harness` → `extension_page_harness`
    pointing at the new production path. crxjs emits the harness HTML
    to `dist-test/tests/uat/extension-page-harness.html` (verified by
    `ls dist-test/tests/uat/`).
  - The `modulePreload: { polyfill: false }` line is PRESERVED — this
    is the CRITICAL SW FIX per 01-11-SUMMARY (disabling the polyfill
    is what makes the test bundle's offscreen-side dynamic import work
    without crashing in non-DOM contexts that incorrectly try to call
    document.querySelector).
  - File-header comment §4 and the inline `define.__MOKOSH_UAT__` comment
    are PRESERVED — load-bearing rationale for the dedicated build-time
    token (vs `import.meta.env.MODE === 'test'` which collides with
    vitest).

Verification (all GREEN):
  - `npm run build:test` — exit 0; dist-test/ emits
    `tests/uat/extension-page-harness.html` and `assets/extension_page_harness-*.js`.
  - `npx tsx tests/uat/a6.test.ts` — exits 0 with "A6 result: PASS";
    5/5 checks GREEN (SETUP: badge becomes REC; A6.1 badge==''; A6.2
    popup==''; A6.3 notif delta==0; A6.4 isRecording=false). End-to-end
    runtime ~7s headless on this workstation.
  - `npx tsc --noEmit` — exit 0 (root tsconfig + tests/uat/tsconfig.json).
  - `npx vitest run` — 92/92 GREEN; the moves do not touch any vitest-
    discovered files.
  - `npm run build` — exit 0; Tier-1 grep gate stays GREEN
    (the moves do not touch production code).

Wave 2 (next): build out `tests/uat/lib/{launch,assertions,harness-page-
driver}.ts` around the extension-page architecture; rewrite
`tests/uat/a6.test.ts` to use the shared lib (still PASSES 5/5).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/uat/a6.test.ts

@@ -1,22 +1,31 @@
-// tests/uat/prototype/a6.test.ts — Plan 01-11 PROTOTYPE.
+// tests/uat/a6.test.ts — Plan 01-13 standalone A6 entry point.
 //
-// Puppeteer-driven feasibility test for the orchestrator-proposed
-// architecture: extension-internal test page + chrome.runtime.sendMessage
-// bridge + synthetic MediaStream. Runs ONE end-to-end assertion: A6
-// (Bug B canonical) — when the offscreen recorder fires
-// RECORDING_ERROR{error: 'user-stopped-sharing'} (simulated via
-// dispatchEvent('ended')), the SW state machine routes through
-// setIdleMode (NOT setErrorMode), badge becomes empty, popup empties,
-// isRecording=false, NO recovery notification fires.
+// Puppeteer-driven single-assertion driver for A6 (Bug B canonical).
+// Originally landed as the Plan 01-11 prototype at commit c647f61;
+// Plan 01-13 Wave 1 promoted this file from `tests/uat/prototype/` to
+// the production path without behavioral change. Wave 2 will refactor
+// the launch + console-capture + result-print plumbing into reusable
+// lib helpers (`tests/uat/lib/{launch,assertions,harness-page-driver}
+// .ts`) and rewrite this driver against them; Wave 3 folds A6 into
+// `tests/uat/harness.test.ts` as the assertion of record for `npm run
+// test:uat`. This standalone entry is RETAINED throughout for fast
+// TDD iteration on the A6 contract (`npx tsx tests/uat/a6.test.ts` —
+// ~7s end-to-end vs the orchestrator's ~60-90s for all 14).
 //
-// VERDICT path: PASS = the prototype architecture works → orchestrator
-// can re-spawn 01-11 executor with new brief. FAIL = architectural
-// blocker(s) remain → falls back to Option B (partial coverage) or
-// Option C (operator UAT).
+// Assertion contract — A6 (Bug B canonical): when the offscreen
+// recorder fires RECORDING_ERROR{error: 'user-stopped-sharing'}
+// (simulated via dispatchEvent('ended') on the active video track per
+// 01-11 RESEARCH §7 BLOCKER — track.stop() does NOT fire 'ended' per
+// W3C spec), the SW state machine routes through setIdleMode (NOT
+// setErrorMode): badge becomes empty, popup empties, isRecording=false,
+// NO recovery notification fires. The prototype verified this PASSES
+// 5/5 today AND FAILS on local revert of the Bug B fix at
+// src/background/index.ts:776 — both halves of the RED-on-regression
+// demo land in the Wave 3B commit body as the canonical TDD canon.
 //
 // Usage:
-//   tsx tests/uat/prototype/a6.test.ts
-//   HEADLESS=0 tsx tests/uat/prototype/a6.test.ts   # debug view
+//   tsx tests/uat/a6.test.ts
+//   HEADLESS=0 tsx tests/uat/a6.test.ts   # debug view
 //
 // Pre-flight: requires `dist-test/` from `npm run build:test`. The test
 // will fail loudly if the bundle is missing.
@@ -34,8 +43,13 @@ import { fileURLToPath } from 'node:url';
 
 import puppeteer, { type Browser, type Page } from 'puppeteer';
 
+// Plan 01-13 Wave 1: this file lives at `tests/uat/a6.test.ts` (was
+// `tests/uat/prototype/a6.test.ts` pre-Wave-1). Repo root is two
+// directory levels up — was three pre-Wave-1. The resolvePath chain
+// MUST stay in sync with the on-disk location or `DIST_TEST_DIR` will
+// resolve to the wrong path and `assertBundlePresent` will throw.
 const HARNESS_FILE_DIR = dirname(fileURLToPath(import.meta.url));
-const REPO_ROOT = resolvePath(HARNESS_FILE_DIR, '..', '..', '..');
+const REPO_ROOT = resolvePath(HARNESS_FILE_DIR, '..', '..');
 const DIST_TEST_DIR = resolvePath(REPO_ROOT, 'dist-test');
 
 /** Per-check record returned by the harness page. */
@@ -130,7 +144,7 @@ async function launchChrome(): Promise<{
 function printResult(result: HarnessAssertionResult): void {
   process.stdout.write('\n');
   process.stdout.write('='.repeat(72) + '\n');
-  process.stdout.write(`PROTOTYPE A6 result: ${result.passed ? 'PASS' : 'FAIL'}\n`);
+  process.stdout.write(`A6 result: ${result.passed ? 'PASS' : 'FAIL'}\n`);
   process.stdout.write(`Assertion: ${result.name}\n`);
   if (result.error !== undefined) {
     process.stdout.write(`Top-level error: ${result.error}\n`);
@@ -155,7 +169,7 @@ function printResult(result: HarnessAssertionResult): void {
  * @returns 0 on PASS, 1 on FAIL.
  */
 async function main(): Promise<number> {
-  process.stdout.write('\nMokosh Plan 01-11 PROTOTYPE — A6 (Bug B canonical) feasibility test\n');
+  process.stdout.write('\nMokosh Plan 01-13 — A6 (Bug B canonical) standalone driver\n');
   process.stdout.write('Architecture: extension-internal page + bridge + synthetic stream\n');
   process.stdout.write('='.repeat(72) + '\n');
 
@@ -173,7 +187,7 @@ async function main(): Promise<number> {
   try {
     // Open the prototype harness page. The page lives at the test-build
     // path (vite.test.config.ts adds it as a rollup input).
-    const harnessUrl = `chrome-extension://${extensionId}/tests/uat/prototype/extension-page-harness.html`;
+    const harnessUrl = `chrome-extension://${extensionId}/tests/uat/extension-page-harness.html`;
     process.stdout.write(`Opening: ${harnessUrl}\n`);
 
     // Open a 'victim' page first — production code calls

tests/uat/extension-page-harness.html

@@ -6,7 +6,7 @@
   </head>
   <body>
     <h1>Mokosh UAT — extension-internal page harness</h1>
-    <p>This page lives at <code>chrome-extension://&lt;id&gt;/tests/uat/prototype/extension-page-harness.html</code>.</p>
+    <p>This page lives at <code>chrome-extension://&lt;id&gt;/tests/uat/extension-page-harness.html</code>.</p>
     <p>Puppeteer navigates a tab here and drives assertions via <code>window.__mokoshHarness.*</code>.</p>
     <pre id="status">Ready.</pre>
     <script type="module" src="./extension-page-harness.ts"></script>

tests/uat/extension-page-harness.ts

@@ -1,46 +1,59 @@
-// tests/uat/prototype/extension-page-harness.ts — Plan 01-11 PROTOTYPE.
+// tests/uat/extension-page-harness.ts — Plan 01-13 production UAT harness.
+//
+// Inherited from the Plan 01-11 prototype at commit c647f61 per the
+// 01-11-SUMMARY.md architectural pivot (Approach B). The prototype
+// proved A6 (Bug B canonical regression rewind) 5/5 GREEN in ~7s
+// end-to-end, validating the architecture summarized below. Plan 01-13
+// Wave 1 promoted this file from `tests/uat/prototype/` to the
+// production path without behavioral change; Wave 3 will extend the
+// `window.__mokoshHarness` surface with assertA1..A13 methods.
 //
 // Extension-internal harness page entrypoint. Lives at
-// `chrome-extension://<id>/tests/uat/prototype/extension-page-harness.html`
+// `chrome-extension://<id>/tests/uat/extension-page-harness.html`
 // in the test build (vite.test.config.ts adds it as a Rollup input).
 //
-// PURPOSE: prove the orchestrator's hypothesis — that the working
-// architecture for MV3 extension UAT is to drive Chrome FROM INSIDE
-// (extension-internal test page + synthetic MediaStream) rather than
-// FROM OUTSIDE (CDP into SW context).
+// ARCHITECTURAL ANCHOR (Approach B): the working architecture for MV3
+// extension UAT is to drive Chrome FROM INSIDE (extension-internal
+// test page + synthetic MediaStream) rather than FROM OUTSIDE (CDP
+// into SW context). Falsification of the Approach-A alternatives
+// (sw.evaluate + popup-bridge + SW-side dynamic-import test hooks)
+// is documented in 01-11-SUMMARY.md.
 //
-// IMPORTANT RESEARCH FINDING (in-flight prototype investigation):
-//   The Plan 01-11 RESEARCH §6 architecture used `await import(...)`
+// IMPORTANT RESEARCH FINDING (load-bearing — DO NOT REGRESS):
+//   Plan 01-11 RESEARCH §6 originally architected `await import(...)`
 //   at the top of src/background/index.ts to gate SW-side test hooks.
-//   EMPIRICAL: dynamic import is BLOCKED in MV3 service workers
-//   (Chrome 148, verified via probe). The SW silently dies — the
-//   chunk file is loaded but the await never resolves, so production
-//   listeners never register. Production sources:
-//     - w3c/webextensions#212 (May 2022, still open)
+//   EMPIRICAL FALSIFICATION (01-11 prototype, verified Chrome 148):
+//   dynamic import is BLOCKED in MV3 service workers. The SW silently
+//   dies — the chunk file is loaded but the await never resolves, so
+//   production listeners never register. Production sources:
+//     - w3c/webextensions#212 (May 2022, still open as of May 2026)
 //     - chromium.googlesource.com es_modules.md: "Dynamic import is
 //       currently blocked in Service Workers, but it will change in
 //       the future."
-//   The prototype WORKS AROUND this by:
-//     1. Removing the SW-side gated dynamic import entirely.
+//   Approach B WORKS AROUND this by:
+//     1. Removing the SW-side gated dynamic import entirely
+//        (src/background/index.ts has comment-only docs at lines 13-30
+//        explaining why no hook gate lands here).
 //     2. Using only the OFFSCREEN-side test hook (offscreen IS a DOM
-//        document, dynamic import works there).
+//        document, dynamic import works there — see
+//        src/offscreen/recorder.ts top-of-module gate).
 //     3. Driving everything from this harness page using PRODUCTION
 //        chrome.* APIs (page has full extension permissions):
 //        - chrome.action.getBadgeText / getPopup — read SW state
 //        - chrome.offscreen.createDocument — create offscreen FIRST
 //          (the page is allowed to call this)
-//        - chrome.runtime.sendMessage REQUEST_PERMISSIONS — trigger
+//        - chrome.runtime.sendMessage START_RECORDING — trigger
 //          production startRecording path (uses existing offscreen +
-//          fake getDisplayMedia)
+//          fake getDisplayMedia from offscreen-hooks.ts)
 //        - chrome.notifications.getAll — count active notifications
 //          (no SW hook needed)
 //        - chrome.runtime.sendMessage __mokoshOffscreenQuery
 //          dispatch-ended — trigger Bug B simulation via offscreen
 //          bridge (offscreen still uses dynamic import → works)
 //
-// The page exposes `window.__mokoshHarness` with one method:
-//   - `assertA6()` — runs the canonical Bug B regression assertion
-//     end-to-end and returns a structured pass/fail record.
+// Wave 1 surface — the page exposes `window.__mokoshHarness` with one
+// method (assertA6); Wave 3 extends to all 13 assertions:
+//   - `assertA6()` — canonical Bug B regression assertion (proven).
 
 /**
  * Result shape returned by harness assertions to Puppeteer.