Ψ-W2-T2 remediation: atomic temp+rename collapse write, honest unknown-channel fallback, [verify — DAW] markers, corrected+filed bake-collapse deferral, observable collapse message, quiet-NaN test

2026-08-01 22:08:39 -04:00
parent 4fa3c1dd15
commit 8b191e3379
12 changed files with 151 additions and 31 deletions
@@ -2661,7 +2661,11 @@ LOSSY fold; this collapse is lossless by predicate) but contradicted in text. Th
 amendment: channel count is preserved except that bit-identical channels may collapse
 losslessly to mono; a lossy fold remains forbidden. Noted in the amendment: the old text
 was already untrue in the other direction — a mono source renders at `RENDER_CHANNELS=2`
-today (`capture_orchestrator.cpp:227`, hardcoded and never measured).
+today (`capture_orchestrator.cpp:227`, hardcoded and never measured). `[verify — DAW]`
+"lossless" is proven at the file-bytes level; it is not the same claim as the null
+test's playback-chain property (whether REAPER sums a 1-channel item on a stereo track
+at the same unity gain as a dual-mono 2-channel item) — see the acceptance criteria's
+own `[verify — DAW]` on that bullet below.

 **Surface boundary — owns:** `core/capture/wav_codec` (the pure bit-identity predicate +
 collapse plan, with `wav_codec` unit tests), `shell/capture/capture.cpp` (the post-render