diff --git a/docs/plans/2026-07-14-stereo-dual-channel-capture.md b/docs/plans/2026-07-14-stereo-dual-channel-capture.md
index f6355db..baf8425 100644
--- a/docs/plans/2026-07-14-stereo-dual-channel-capture.md
+++ b/docs/plans/2026-07-14-stereo-dual-channel-capture.md
@@ -1,6 +1,8 @@
 # Plan: dual-channel capture (mic = left, loopback = right) — FR-SPK / FR-CAP
 
-Status: **draft for review**, 2026-07-14. Supersedes the summed-mono + masked-diarize approach
+Status: **implemented** 2026-07-14 (all 3 sign-off answers: DB column; retire MicActivity with a
+code note; export → dual-mono). Migration 0009 + `write_wav_split` + `attribute_split` +
+`fold_wav` + ADR-0005 Phase 3.5. Supersedes the summed-mono + masked-diarize approach
 in [`2026-07-13-diarization-phase3-per-stream-attribution.md`](./2026-07-13-diarization-phase3-per-stream-attribution.md).
 The proposed **ADR-0005 amendment** is at the bottom — apply it on approval.