Files
hyperframes/packages
Vance IngallsandClaude Opus 5 c3daa90ba7 fix(core,studio): a voice track is never a carve bed, and never carves its own group
A narration clip inside a Voiceover group had a carve pointed at that
group — a member ducking the bus it feeds. Three faults, each sufficient
on its own.

**No bed-eligibility rule.** `couldBeCarveSource` has said since it was
written that music and sfx cannot be sources, and it is called from
nowhere — exported, tested, dead. Nothing ever asked the near-end
question: can this track be the BED. `showCarve` only asked "is anything
already carving against me, and is there anything to listen to", so a
voice track was offered the control like any other. Added
`couldBeCarveBed` beside its sibling and wired it in.

**Offering is not applying.** A bed with exactly one candidate carves
itself unasked, which is right for a track named `music-bed` and wrong
for one named `a1` — a decision taken off a name that said nothing is how
a carve appears that nobody remembers configuring. `isNamedCarveBed`
gates self-application on a name that positively reads as a bed; the
picker stays looser, the same split the source side already makes between
`sourceOptions` and `autoSourceIds`.

**A bed was offered its own group.** The candidate scan excluded exactly
one element, the bed itself. Its siblings survived that filter and rolled
up into the very group the bed belongs to, which came back as a
candidate — and being the only one, was applied. The mirror case too: a
group bed's id matches no <audio> id, so nothing stopped a group carving
against itself. `collectCarveCandidates` now takes the bed's id and drops
both it and its group.

An existing carve still shows its module (`carve !== null`), so nothing
already configured becomes unreachable — only newly offered and
self-applied ones are refused.

The bed/relationship predicates moved to `useFxCarveGrouping.ts`, next to
the source-eligibility rules they belong with. That is also what puts
`useFxCarve.ts` back under the 600-line ceiling it crossed here.

Five tests, each mutation-checked against the pre-fix code. Verified live:
selecting `vo-2` renders no carve module; `music-bed` still gets one,
listening to `Voiceover (4)`.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-20 02:20:02 -07:00
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