diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index 80ffa2a..9f1b130 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -72,7 +72,7 @@ directory + `vite.config.ts` inline string + `src/background/`.
 - [x] 01-03-PLAN.md — Offscreen recorder TDD: ring buffer + codec strict-mode + getDisplayMedia + track-ended cleanup; D-13 fallback skeleton pre-staged
 - [x] 01-04-PLAN.md — Port keepalive + OFFSCREEN_READY handshake (TDD): replaces alarms keepalive on offscreen side
 - [x] 01-05-PLAN.md — SW shrink: delete legacy buffer + alarms + IndexedDB + tabCapture paths; wire SW-side onConnect host
-- [ ] 01-06-PLAN.md — Build pipeline collapse: delete vite.config.ts inline plugin + top-level offscreen/ dir; declare rollupOptions.input
+- [x] 01-06-PLAN.md — Build pipeline collapse: delete vite.config.ts inline plugin + top-level offscreen/ dir; declare rollupOptions.input
 - [ ] 01-07-PLAN.md — Manual smoke + ffprobe D-12 acceptance gate; commit regression fixture
 
 ### Phase 2: Stabilize DOM + event capture privacy
@@ -224,7 +224,7 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5.
 
 | Phase | Plans Complete | Status | Completed |
 |-------|----------------|--------|-----------|
-| 1. Stabilize video pipeline | 4/7 | In Progress|  |
+| 1. Stabilize video pipeline | 6/7 | In Progress|  |
 | 2. Stabilize DOM + event capture privacy | 0/TBD | Not started | - |
 | 3. Stabilize export pipeline | 0/TBD | Not started | - |
 | 4. SPEC §10 smoke verification | 0/TBD | Not started | - |
diff --git a/.planning/STATE.md b/.planning/STATE.md
index 3743955..521b81c 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -3,15 +3,15 @@ gsd_state_version: 1.0
 milestone: v2.0.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed Plan 01-05 — SW shrink + onConnect host wired (T-1-04 sender check, OFFSCREEN_READY handshake, port-based buffer fetch, IDB orphan cleanup, hasDocument re-sync); 9/9 tests still green; Plan 06 next (vite.config.ts collapse)
-last_updated: "2026-05-15T16:06:29.434Z"
+stopped_at: Completed Plan 01-06 — vite.config.ts collapse (226 -> 21 lines), orphan offscreen/ dir deleted, dist build green, crxjs Outcome A confirmed and SW URL reconciled (chrome.runtime.getURL('src/offscreen/index.html')); 9/9 tests still green; Plan 07 next (ffprobe acceptance gate)
+last_updated: "2026-05-15T16:16:50.760Z"
 last_activity: 2026-05-15
 progress:
   total_phases: 5
   completed_phases: 0
   total_plans: 7
-  completed_plans: 5
-  percent: 71
+  completed_plans: 6
+  percent: 86
 ---
 
 # Project State
@@ -28,12 +28,12 @@ no server, no password leaks.
 ## Current Position
 
 Phase: 1 (Stabilize Video Pipeline) — EXECUTING
-Plan: 6 of 7
+Plan: 7 of 7
 Status: Ready to execute
 Last activity: 2026-05-15
 REQUIREMENTS.md, ROADMAP.md, STATE.md written)
 
-Progress: [███████░░░] 71%
+Progress: [█████████░] 86%
 
 ## Performance Metrics
 
@@ -64,6 +64,7 @@ Progress: [███████░░░] 71%
 | Phase 1 P03 | 8min | 3 tasks | 5 files |
 | Phase 01 P04 | 4min | 3 tasks | 1 files |
 | Phase 01 P05 | 8min | 2 tasks | 1 files |
+| Phase 1 P06 | 3min | 2 tasks | 2 files |
 
 ## Accumulated Context
 
@@ -98,6 +99,8 @@ current work:
 - [Phase ?]: [Phase 01-05]: Added chrome.offscreen.hasDocument() in initialize() — Rule 2 robustness, audit P1 #8 mitigation across SW respawns
 - [Phase ?]: [Phase 01-05]: SW is now a pure coordinator — onConnect host bound to 'video-keepalive' port with T-1-04 sender check; getVideoBufferFromOffscreen replaces synchronous SW-local buffer fetch; OFFSCREEN_READY handshake closes the audit P1 #12 race
 - [Phase ?]: [Phase 01-05]: indexedDB.deleteDatabase('VideoRecorderDB') in onInstalled — T-1-NEW-05-02 / RESEARCH.md Runtime State Inventory cleanup of orphaned IDB from pre-Phase-01 builds
+- [Phase ?]: [Phase 01-06]: Collapsed vite.config.ts from 226 -> 21 lines (RESEARCH.md Example B verbatim); deleted 174-line inline copy-offscreen plugin (audit P0 #1 root cause) and the orphan offscreen/ top-level directory (D-08)
+- [Phase ?]: [Phase 01-06]: crxjs Outcome A confirmed — dist/src/offscreen/index.html (preserves src/ prefix from rollupOptions.input key). SW URL adjusted to chrome.runtime.getURL('src/offscreen/index.html'); RESEARCH.md Pitfall 5 binding empirically verified
 
 ### Pending Todos
 
@@ -120,7 +123,7 @@ Items acknowledged and carried forward from previous milestone close:
 
 ## Session Continuity
 
-Last session: 2026-05-15T16:06:29.412Z
-Stopped at: Completed Plan 01-05 — SW shrink + onConnect host wired (T-1-04 sender check, OFFSCREEN_READY handshake, port-based buffer fetch, IDB orphan cleanup, hasDocument re-sync); 9/9 tests still green; Plan 06 next (vite.config.ts collapse)
+Last session: 2026-05-15T16:16:50.743Z
+Stopped at: Completed Plan 01-06 — vite.config.ts collapse (226 -> 21 lines), orphan offscreen/ dir deleted, dist build green, crxjs Outcome A confirmed and SW URL reconciled (chrome.runtime.getURL('src/offscreen/index.html')); 9/9 tests still green; Plan 07 next (ffprobe acceptance gate)
 intel synthesis. Coverage validated: 11/11 v1 REQs mapped.
-Resume file: .planning/phases/01-stabilize-video-pipeline/01-06-PLAN.md
+Resume file: None
diff --git a/.planning/phases/01-stabilize-video-pipeline/01-06-SUMMARY.md b/.planning/phases/01-stabilize-video-pipeline/01-06-SUMMARY.md
new file mode 100644
index 0000000..3af8c25
--- /dev/null
+++ b/.planning/phases/01-stabilize-video-pipeline/01-06-SUMMARY.md
@@ -0,0 +1,307 @@
+---
+phase: 01-stabilize-video-pipeline
+plan: 06
+subsystem: build-pipeline
+tags: [vite, crxjs, rollup-input, mv3, offscreen-document, dead-code-deletion, build-config, p0-1, audit-p2-17, audit-p2-18, d-07, d-08]
+
+# Dependency graph
+requires:
+  - phase: 01-stabilize-video-pipeline
+    provides: "Plan 03 created src/offscreen/index.html + src/offscreen/recorder.ts (the crxjs-managed entry that replaces the orphan offscreen/ dir); Plan 05 left chrome.runtime.getURL('offscreen/index.html') in src/background/index.ts:45 for Plan 06 to reconcile against the actual crxjs emit path"
+provides:
+  - "Collapsed vite.config.ts: 226 → 21 lines (-205). The 174-line inline copy-offscreen plugin (audit P0 #1 root cause) is GONE."
+  - "Orphan offscreen/ top-level directory deleted (offscreen/index.ts + offscreen/index.html — both dead per D-08)."
+  - "rollupOptions.input.offscreen wired to src/offscreen/index.html (RESEARCH.md Example B); crxjs picks up the recorder.ts module via the HTML <script> reference."
+  - "Outcome A confirmed: crxjs PRESERVES the src/ prefix in the bundled output — dist/src/offscreen/index.html, NOT dist/offscreen/index.html."
+  - "src/background/index.ts line 45 reconciled: chrome.runtime.getURL('src/offscreen/index.html') now matches the actual emit path (RESEARCH.md Pitfall 5 binding)."
+  - "Clean dist/ layout: manifest.json + service-worker-loader.js + 7 hashed assets/*.js bundles + bundled HTML for offscreen and popup + icons."
+affects: [01-07-ffprobe-gate]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "Minimal vite config pattern: crx() + rollupOptions.input — the canonical crxjs MV3 idiom (discussions #919 and #1060)."
+    - "Build-time path binding: the SW's chrome.runtime.getURL string MUST equal the rollup input key path (Pitfall 5). Verified empirically post-build, not inferred."
+    - "Build-config attack-surface reduction: deleting an inline plugin that called this.emitFile with a stringified JS payload removes a string-injection vector (T-1-NEW-06-01)."
+
+key-files:
+  created: []
+  modified:
+    - "vite.config.ts (226 → 21 lines; the entire inline copy-offscreen plugin block, the misplaced publicDir+copyPublicDir keys, and the manualChunks:undefined shape are all gone; replaced with RESEARCH.md Example B verbatim)"
+    - "src/background/index.ts:45 (1-line change; getURL('offscreen/index.html') → getURL('src/offscreen/index.html') to match crxjs Outcome-A emit path)"
+  deleted:
+    - "offscreen/index.ts (60 lines of dead tabCapture-era recorder; replaced by src/offscreen/recorder.ts per D-07 / D-08)"
+    - "offscreen/index.html (10 lines; replaced by src/offscreen/index.html created by Plan 03)"
+    - "offscreen/ top-level directory (now empty; rmdir'd)"
+
+key-decisions:
+  - "Outcome A obtained: crxjs preserves the 'src/' prefix from the rollupOptions.input key. dist/src/offscreen/index.html is the emitted path, not dist/offscreen/index.html. RESEARCH.md Pitfall 5 documented both possibilities; the runtime verification settled it. SW URL string was updated accordingly (1-line fix in src/background/index.ts:45)."
+  - "No path adjustment via 'leaving the SW URL unchanged' (Outcome B) was used — that would have required some non-crxjs build trick to strip the src/ prefix, and there's no benefit. Outcome A is the canonical crxjs behavior; matching the SW URL to it is the simplest correct path."
+  - "Followed the plan's verbatim Example-B vite.config.ts (with double quotes per the plan body, which differ from the codebase's prior single-quote style — but the plan body specifies double quotes, and Prettier hasn't yet established a project-wide rule, so verbatim was preferred over style-rewrap)."
+  - "Did NOT mark REQ-video-ring-buffer complete: per the prompt and Plan 05's precedent, Plan 07's ffprobe gate is the requirement-satisfaction proof."
+
+patterns-established:
+  - "crxjs entry pattern: HTML in rollupOptions.input → crxjs binds the HTML's <script type=module> ref → bundled output preserves the input key path. The SW resolves the runtime URL via chrome.runtime.getURL(<same-key>)."
+  - "Two-step verification flow for any future build-config change: (1) edit vite.config.ts, (2) rm -rf dist && npm run build, (3) inspect dist/ for the actual emit paths, (4) reconcile any SW/manifest references that hard-code paths. This avoids the Pitfall 5 class of 'works locally because no one ran the build' bugs."
+
+requirements-completed: []  # REQ-video-ring-buffer remains pending Plan 07 ffprobe gate
+
+# Metrics
+duration: 3min
+completed: 2026-05-15
+---
+
+# Phase 01 Plan 06: Vite Config Collapse Summary
+
+**Collapsed `vite.config.ts` from 226 lines to 21 by deleting the 174-line inline `copy-offscreen` plugin (audit P0 #1) and the dead `offscreen/` top-level directory; wired the new `src/offscreen/index.html` entry via `rollupOptions.input`; verified the crxjs emit path against the SW's `chrome.runtime.getURL(...)` string (Pitfall 5) and adjusted the SW URL to `src/offscreen/index.html` to match Outcome A.**
+
+## Performance
+
+- **Duration:** ~3 min
+- **Started:** 2026-05-15T16:09:24Z
+- **Completed:** 2026-05-15T16:11:30Z
+- **Tasks:** 2 (vite.config.ts rewrite + dead-code deletion; build verification + path reconciliation)
+- **Commits:** 2 (one per task)
+- **Files modified:** 2 (`vite.config.ts`, `src/background/index.ts`)
+- **Files deleted:** 2 (`offscreen/index.ts`, `offscreen/index.html`) + 1 dir (`offscreen/`)
+
+## Before / After
+
+| Snapshot | vite.config.ts lines | Notes |
+|----------|----------------------|-------|
+| Pre-Plan 06 | **226** | Inline copy-offscreen plugin (lines 13-216) + misplaced publicDir/copyPublicDir + manualChunks:undefined shape. |
+| Post-Task 1 | **21** | RESEARCH.md Example B verbatim — crx() + rollupOptions.input.offscreen. The plan's `wc -l vite.config.ts ≤ 30` ceiling is comfortably met. |
+
+```
+$ find offscreen/ 2>&1 || echo absent
+bfs: error: offscreen/: No such file or directory.
+absent
+```
+
+## Task 1: vite.config.ts rewrite + offscreen/ deletion
+
+**Commit:** `23e69d0 refactor(01-06): delete inline copy-offscreen plugin and orphan offscreen/ directory`
+
+**Deletions:**
+- `offscreen/index.ts` (60 lines — orphan dead-code from tabCapture era; D-08 explicit DELETE target; audit P2 #18)
+- `offscreen/index.html` (10 lines — replaced by `src/offscreen/index.html` per D-07 / Plan 03)
+- `offscreen/` directory (rmdir after the two file deletes; verified empty first)
+- `vite.config.ts` inline `copy-offscreen` plugin (174 lines, lines 13-216): the `this.emitFile`-based emitter for both the offscreen HTML and the stringified JS module that ran the tabCapture-era chromeMediaSource + IndexedDB recording. T-1-NEW-06-01 mitigation.
+- `vite.config.ts` misplaced `publicDir: 'public'` / `copyPublicDir: true` (audit P2 #17 — there is no `public/` directory in this repo)
+- `vite.config.ts` `rollupOptions.output.manualChunks: undefined` (no longer needed; crxjs handles chunking)
+
+**Replacement — final `vite.config.ts`:**
+
+```typescript
+import { defineConfig } from 'vite';
+import { crx } from '@crxjs/vite-plugin';
+import manifest from './manifest.json';
+
+export default defineConfig({
+  plugins: [
+    crx({
+      manifest,
+      contentScripts: {
+        injectCss: false,
+      },
+    }),
+  ],
+  build: {
+    rollupOptions: {
+      input: {
+        offscreen: 'src/offscreen/index.html',
+      },
+    },
+  },
+});
+```
+
+**Acceptance gates (all PASS):**
+
+| Gate | Expected | Actual |
+|------|----------|--------|
+| `test ! -f offscreen/index.ts` | exit 0 | PASS |
+| `test ! -f offscreen/index.html` | exit 0 | PASS |
+| `test ! -d offscreen` | exit 0 | PASS |
+| `grep -c "copy-offscreen" vite.config.ts` | 0 | 0 |
+| `grep -c "this.emitFile" vite.config.ts` | 0 | 0 (T-1-NEW-06-01 grep gate) |
+| `grep -c "VideoRecorderDB" vite.config.ts` | 0 | 0 |
+| `grep -c "openIndexedDB" vite.config.ts` | 0 | 0 |
+| `grep -c "chromeMediaSource" vite.config.ts` | 0 | 0 |
+| `grep -c "rollupOptions" vite.config.ts` | 1 | 1 |
+| `grep -c "src/offscreen/index.html" vite.config.ts` | 1 | 1 |
+| `wc -l vite.config.ts` | ≤ 30 | 21 |
+| `npx tsc --noEmit` | exit 0 | PASS |
+| `npx vitest run` | 9/9 PASS | 9/9 PASS |
+
+## Task 2: Build verification + offscreen URL reconciliation
+
+**Commit:** `6aeeda4 fix(01-06): align ensureOffscreen URL with crxjs emit path`
+
+### `npm run build` output (excerpt)
+
+```
+> ai-call-extension@1.0.0 build
+> tsc && vite build
+
+vite v5.4.21 building for production...
+transforming...
+✓ 59 modules transformed.
+rendering chunks...
+computing gzip size...
+dist/service-worker-loader.js                     0.04 kB
+dist/icons/icon16.png                             0.08 kB
+dist/icons/icon48.png                             0.12 kB
+dist/icons/icon128.png                            0.31 kB
+dist/assets/index.ts-loader-BkeIfRno.js           0.34 kB
+dist/src/offscreen/index.html                     0.39 kB │ gzip:  0.23 kB
+dist/src/popup/index.html                         0.76 kB │ gzip:  0.51 kB
+dist/manifest.json                                1.14 kB │ gzip:  0.55 kB
+dist/assets/index-BXJP9H5s.css                    1.08 kB │ gzip:  0.54 kB
+dist/assets/modulepreload-polyfill-B5Qt9EMX.js    0.71 kB │ gzip:  0.40 kB
+dist/assets/logger-D8-HRtHy.js                    1.04 kB │ gzip:  0.32 kB
+dist/assets/index.html-BR0hR1fK.js                2.27 kB │ gzip:  1.04 kB
+dist/assets/offscreen-SqX0ET3Q.js                 3.03 kB │ gzip:  1.42 kB
+dist/assets/index.ts-BcLq5y3Q.js                 73.79 kB │ gzip: 24.04 kB
+dist/assets/index.ts-D-8Ku9Ua.js                104.47 kB │ gzip: 32.91 kB
+✓ built in 1.09s
+```
+
+### `find dist -type f | sort` — full layout for Plan 07's manual smoke load
+
+```
+dist/assets/index-BXJP9H5s.css
+dist/assets/index.html-BR0hR1fK.js
+dist/assets/index.ts-BcLq5y3Q.js
+dist/assets/index.ts-D-8Ku9Ua.js
+dist/assets/index.ts-loader-BkeIfRno.js
+dist/assets/logger-D8-HRtHy.js
+dist/assets/modulepreload-polyfill-B5Qt9EMX.js
+dist/assets/offscreen-SqX0ET3Q.js
+dist/icons/icon128.png
+dist/icons/icon16.png
+dist/icons/icon48.png
+dist/manifest.json
+dist/service-worker-loader.js
+dist/src/offscreen/index.html
+dist/src/popup/index.html
+```
+
+### Outcome identification — RESEARCH.md Pitfall 5
+
+The bundled offscreen HTML lands at `dist/src/offscreen/index.html` (crxjs **preserved** the `src/` prefix from the rollup input key). `dist/offscreen/index.html` does NOT exist. This is **Outcome A** per the plan's dichotomy.
+
+**SW URL adjustment:** Plan 05 left `chrome.runtime.getURL('offscreen/index.html')` at `src/background/index.ts:45`. Under Outcome A this would have produced `ERR_FILE_NOT_FOUND` at `chrome.offscreen.createDocument` time and broken Plan 07's manual smoke load. The one-line edit:
+
+```diff
+-    const url = chrome.runtime.getURL('offscreen/index.html');
++    const url = chrome.runtime.getURL('src/offscreen/index.html');
+```
+
+The committed SW URL string and the actual `dist/` emit path now match — verified empirically, not inferred.
+
+### `dist/manifest.json` permissions verification
+
+```
+$ node -e "const m=require('./dist/manifest.json'); const p=m.permissions; \
+    console.log('Has desktopCapture:', p.includes('desktopCapture')); \
+    console.log('Has tabCapture:', p.includes('tabCapture'));"
+
+Has desktopCapture: true
+Has tabCapture: false
+```
+
+The post-D-A6 manifest amendment propagated correctly through crxjs into the bundled `dist/manifest.json` — `desktopCapture` present, `tabCapture` absent, `alarms` absent (already removed by Plan 05's manifest cleanup).
+
+### Acceptance gates (all PASS)
+
+| Gate | Expected | Actual |
+|------|----------|--------|
+| `npm run build` exit code | 0 | 0 |
+| `dist/manifest.json` exists | YES | YES |
+| `dist/src/offscreen/index.html` OR `dist/offscreen/index.html` | one of two | dist/src/offscreen/index.html (Outcome A) |
+| `dist/manifest.json` permissions contains `desktopCapture` | YES | YES |
+| `dist/manifest.json` permissions contains `tabCapture` | NO | NO |
+| SW `chrome.runtime.getURL(...)` string matches dist emit | YES | YES (src/offscreen/index.html) |
+| `dist/assets/` JS file count | ≥ 1 | 7 |
+| `npx tsc --noEmit` post-edit | exit 0 | PASS |
+| `npx vitest run` post-edit | 9/9 PASS | 9/9 PASS |
+
+## Deviations from Plan
+
+### Rule 1 — Bug fix (auto-applied, paired with Task 2)
+
+**1. [Rule 1 - Bug] SW URL `chrome.runtime.getURL('offscreen/index.html')` would have 404'd against the Outcome-A dist layout**
+
+- **Found during:** Task 2 (the planned post-build path reconciliation — this is the exact scenario RESEARCH.md Pitfall 5 calls out).
+- **Issue:** Plan 05's executor left the pre-amendment string `'offscreen/index.html'` at `src/background/index.ts:45`. Once Plan 06 wired `rollupOptions.input.offscreen = 'src/offscreen/index.html'` and crxjs preserved the `src/` prefix in the emit, the SW URL no longer pointed at a real file. `chrome.offscreen.createDocument` would have returned `ERR_FILE_NOT_FOUND`. Plan 05's executor explicitly flagged this as the Task-2 runtime verification of Plan 06 (citation: STATE.md decisions block).
+- **Fix:** One-line edit — `'offscreen/index.html'` → `'src/offscreen/index.html'`.
+- **Files modified:** `src/background/index.ts:45`.
+- **Verification:** Post-edit `npm run build` still exits 0; the committed string is `chrome.runtime.getURL('src/offscreen/index.html')` and `dist/src/offscreen/index.html` exists.
+- **Committed in:** `6aeeda4` (Task 2 commit).
+
+This was foreseen by the plan body itself (it explicitly describes the A/B outcome dichotomy and prescribes the edit conditional on which outcome obtains). It is a deviation only against the literal "Task 2 may need no commit if no path adjustment was needed" branch — Outcome A required the adjustment, so Task 2 produced its own commit. Not a true deviation in spirit; logged here for traceability.
+
+---
+
+**Total deviations:** 1 auto-fixed (Rule 1 — path binding).
+**Impact on plan:** Zero scope creep. The plan body anticipated exactly this fix and put it inline as Task 2 step (4). The line edit was load-bearing for Plan 07's manual smoke load.
+
+## Issues Encountered
+
+None. Build was clean on first run. Tests stayed at 9/9 throughout. No tsc errors. No regressions in Plan 04's port-based test suite or Plan 02 / Plan 03's ring-buffer + codec-check suites.
+
+## TDD Gate Compliance
+
+This plan was `type: execute` (not `type: tdd`). No RED/GREEN/REFACTOR cycle required. The existing test suite served as a regression guard — `npx vitest run` returned 9/9 PASS both at the start of the plan and after each task commit.
+
+## Authentication Gates
+
+None. Pure build-pipeline refactor.
+
+## Known Stubs
+
+None. The replacement `vite.config.ts` is complete and functional — `npm run build` produces a loadable extension. No placeholder/TODO/coming-soon markers introduced.
+
+## Threat Flags
+
+None. Threat surface is REDUCED, not expanded:
+- T-1-NEW-06-01 (string-injected code via inline plugin): MITIGATED — the entire inline plugin with its `this.emitFile({ source: \`<JS-as-string>\` })` calls is deleted. Grep gate `grep -c "this.emitFile" vite.config.ts` returns 0.
+- T-1-NEW-06-02 (orphaned root-level offscreen): MITIGATED — `offscreen/` directory absent. The post-deletion `find offscreen/` reports "No such file or directory" / "absent".
+
+## CLAUDE.md Compliance
+
+- No `as any` casts introduced in any modified file (vite.config.ts has no casts; the SW edit is a string literal change).
+- No `@ts-ignore` introduced.
+- `vite.config.ts` follows the canonical RESEARCH.md Example B form (lifted verbatim from a cited authoritative source — crxjs documentation + discussion #919).
+- No new constants needed to be moved; the replacement file is small enough that no extracted-constants refactor applies.
+
+## Next Plan Readiness — Plan 07
+
+Plan 07 (the ffprobe acceptance gate per D-12) can now:
+1. Load `dist/` unpacked into Chrome ≥ 116 (no further build needed; `dist/manifest.json` is the loadable extension).
+2. Trigger the recording from popup; the offscreen at `dist/src/offscreen/index.html` will be created by the SW's `chrome.offscreen.createDocument({ url: 'chrome-extension://<id>/src/offscreen/index.html', ... })` call.
+3. Run the ffprobe acceptance gate against the exported `last_30sec.webm`.
+
+The full `dist/` listing is captured above so Plan 07's smoke test knows the exact files to expect.
+
+> Plan 07 loads `dist/` unpacked into Chrome ≥ 116 and runs the ffprobe acceptance gate (D-12).
+
+## Self-Check
+
+Verified after writing this summary:
+- vite.config.ts file exists: FOUND.
+- src/background/index.ts file exists: FOUND.
+- offscreen/ directory absent: FOUND (the absence itself was checked: `find offscreen/ 2>&1 || echo absent` → absent).
+- dist/manifest.json exists: FOUND.
+- dist/src/offscreen/index.html exists: FOUND.
+- Commit `23e69d0` exists in git log (Task 1).
+- Commit `6aeeda4` exists in git log (Task 2).
+- `npx tsc --noEmit` exits 0.
+- `npx vitest run` reports 9/9 PASS across 4 test files.
+- `wc -l vite.config.ts` returns 21 (≤ 30 plan ceiling).
+- `grep -c "copy-offscreen\|chromeMediaSource\|this.emitFile" vite.config.ts` returns 0.
+- SW URL string `chrome.runtime.getURL('src/offscreen/index.html')` matches Outcome-A emit path `dist/src/offscreen/index.html`.
+
+## Self-Check: PASSED