docs: record S3b containment milestone

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2026-08-15 15:31:07 -04:00
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# Implementation plan: whole-desktop screen-share audio without self-echo
**Status:** 🟢 **v4 — three review rounds applied.** *Progress as of 2026-08-07:* phases 0a, 0b,
**Status:** 🟢 **v4 — three review rounds applied.** *Progress as of 2026-08-15:* phases 0a, 0b,
0c step 1, 1, 2, 3, 3r, 4 and 5 are merged, and the **phase-5 major gate PASSED on 2026-07-26**
(§1). The current front is **0c step 2**, sliced S1S5: S1 and S2 merged, **S3a built but
unmerged** (pixelpass `s3a-module-ledger`), S3b/S4/S5 not started. **0d and phases 69 are not
(§1). The current front is **0c step 2**, sliced S1S5: S1 and S2 are merged; **S3a is merged
locally** in pixelpass (`15d1374`); and **S3b is built and validated in the pixelpass working
tree and committed locally** (`5d3da8b`). S4/S5 are not complete. **0d and phases 69 are not
built** — nothing merged to date mutates the graph, so the feature has no user-visible behaviour
yet. Phase 6 is the first mutation.
**Date:** 2026-07-21 (v4); status line refreshed 2026-08-07
**Date:** 2026-07-21 (v4); status line refreshed 2026-08-15
**Design of record:** [`screenshare-audio-exclusion-plan.md`](screenshare-audio-exclusion-plan.md) v3.4 (`8768cd2`), converged round 7.
**Scope:** *ordering, gates and acceptance criteria only.*
@@ -111,8 +112,8 @@ Record: [`screenshare-audio-exclusion-phase5-results.md`](screenshare-audio-excl
of the re-run for both carriers (plan §3) and was satisfied — rows 4 and 5 passed at the real
tagging sites. **Phase 6 is no longer blocked by this gate.** What still blocks it is the rest
of the DAG: `0b → 6` is satisfied and merged, but `0c → 0d → 6` is not — **0c step 2 remains
open** (S1 and S2 merged; S3a built but UNMERGED on pixelpass `s3a-module-ledger`; S3b, S4 and
S5 not started), and **0d has not been built at all**.
open** (S1 and S2 merged; S3a merged locally in pixelpass; S3b built, validated and committed
locally at `5d3da8b`; S4/S5 incomplete), and **0d has not been built at all**.
⚠️ **Superseded, kept for the trail — status 2026-07-25 (evening): "3r is BUILT AND MERGED; the
re-run has not happened yet."** The phase-5 gate failed on its first live run and put 3r into