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docs(01-01): amend REQ-video-ring-buffer per D-A4

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Replace the REQ-video-ring-buffer bullet to bind the new
getDisplayMedia + offscreen-document acquisition path and drop the
'active-tab' wording (the new API is screen/window-scoped, not
tab-scoped, so there is nothing to re-attach on tab switch). Encoding,
buffer window, and SPEC §10 acceptance citations are unchanged. Adds
CON-display-capture-binding alongside the existing constraint bindings.
This commit is contained in:
Mark
2026-05-15 17:15:24 +02:00
parent b1ed2cbf49
commit 597d967ccf
1 changed files with 13 additions and 7 deletions
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20
.planning/REQUIREMENTS.md
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@@ -17,13 +17,19 @@ Requirements for the Phase 1 SPEC. Each maps to one phase in ROADMAP.md.
### Video ### Video
- [ ] **REQ-video-ring-buffer**: The extension maintains an in-memory ring - [ ] **REQ-video-ring-buffer**: The extension maintains an in-memory ring
buffer containing the most recent 30 seconds of active-tab video. Video is buffer containing the most recent 30 seconds of captured video. AMENDED in
captured via `chrome.tabCapture.capture()` at `video/webm; codecs=vp9` @ Phase 01: video is acquired via `navigator.mediaDevices.getDisplayMedia()`
400 000 bps with a `MediaRecorder` timeslice of 2000 ms. A single continuous invoked from the offscreen document (with `chrome.offscreen.Reason.DISPLAY_MEDIA`),
recorder per session; tab activation changes trigger re-attach. The first NOT `chrome.tabCapture` as originally specified. The captured stream is
emitted chunk (WebM header) is retained indefinitely; subsequent chunks screen-or-window-scoped per the operator's one-time selection in Chrome's
rotate out by the 30-second TTL rule. Bindings: DEC-003, DEC-009, native picker, and continues unchanged across tab switches. Encoding is
CON-video-window, CON-video-codec, CON-webm-header-retention. unchanged: `video/webm; codecs=vp9` @ 400 000 bps with a `MediaRecorder`
timeslice of 2000 ms; a single continuous recorder runs for the whole
session. The first emitted chunk (WebM header) is retained indefinitely;
subsequent chunks rotate out by the 30-second TTL rule. Bindings: DEC-003
(AMENDED), DEC-009, CON-video-window, CON-video-codec,
CON-webm-header-retention, CON-display-capture-binding (replaces RETIRED
CON-tab-capture-binding).
- SPEC §10 acceptance criteria: #2, #3, #7. - SPEC §10 acceptance criteria: #2, #3, #7.
### DOM Capture ### DOM Capture