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Vance IngallsandClaude Opus 5
54212fde73
Browser-verified the one surface that had never been run: a group and its members declared entirely inside a sub-composition. Both fixes written for that case were broken, and both of their tests passed — because I wrote fixtures that matched my assumption instead of the DOM. Membership never arrived. `hostElementState` inherits from the flat store twin, and a sub-comp that declares its own group keeps those members OUT of the flat store — the store held three elements (panel, sub-comp host, bed) and neither voice. So there was nothing to inherit from and no group row appeared at all. Membership now rides `DomClipChild`, captured during the DOM walk that is the only place holding the child's live element, with the flat twin still preferred when it exists. Routing never worked either. `getTimelineElementSourceFile` stops at the nearest `[data-composition-id]`, which for an inlined sub-composition is its own ROOT element — that carries the composition id but not the file. The file sits on the HOST above it: hf-audio-group#voiceover (no composition attrs) section#voices-root data-composition-id="voices" <- stopped here div#voices-host data-composition-file="...voices.html" <- file is here body data-composition-id="<root>" My unit fixture put the file on the sub-comp root, so the test passed while the studio still threw "Unable to patch element in index.html" on every mute, fader move and FX preset. The resolver climbs composition ancestors until one names a file, and returns undefined for a root-level group so the caller still falls back to activeCompPath. The new tests use the ancestor shape copied from a live preview, and both fixes were mutation-checked. Verified end to end in the studio: the group row appears with its members nested, mute writes `data-hidden` into compositions/voices.html and not index.html, unmute removes it, and the fader writes data-volume="0.35" to the same file. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>