- html-schema: the previous clause claimed a composition host's data-media-start is
never read. It is: readElementPlaybackStart (media.ts:16) resolves
data-playback-start ?? data-media-start and timeline.ts calls it on composition
clips. Rewrote to the accurate reason both reviewers gave — composition hosts are
only inspected by the playback-start-first readers, media-start works as a
fallback, but playback-start is what Studio writes/normalises to.
- motion test: pin the HoverVideo click-suppression (preventDefault +
stopPropagation). Removing it left the gate 12/12; now it fails. This is the bug
that escaped static review and only surfaced by driving the live preview.
- replica-compare: fold the visible 'Sound off/on' text into the aria-label so the
accessible name contains it (WCAG 2.5.3, Rames).
Round-5 findings from Magi and Rames.
- replica-compare: the offscreen teardown now resets muted (element + React state),
matching HoverVideo — a pair unmuted before it scrolled away no longer returns
reading 'Sound on' over a paused, sourceless pair (Magi blocker).
- Both controls' aria-labels now follow the mode: under reduced motion the button
plays/pauses the whole comparison, and when a preview is already autoplaying
muted the action is 'unmute', not 'play with sound' (self-review + Rames).
- Hardened the motion-suite assertion to scope 'startBoth' to toggleSound's body
(a defined-but-unused helper no longer satisfies it) and pin the offscreen
muted-reset transition (Rames mutation-test gap).
- html-schema: 'hyperframes validate' inspects <audio> only; note that no
media-start-only reader inspects a composition host, so the kind rule strands
nobody (Rames).
- replica-compare: the voluntary control now starts and pauses BOTH films (not
just the reference), and the replica-sync effect attaches in view regardless of
the preference, so a reduced-motion visitor who presses play sees the whole
synchronized pair. Added a focused source-level assertion to the motion-check
suite (the repo has no React runtime harness for snippets).
- html-schema: describe each layer precisely instead of grouping the CLI —
timing compiler, HTML parser, producer audio, and 'hyperframes validate' read
only data-media-start; runtime, Studio and 'hyperframes snapshot' read
data-playback-start first (Studio also writes it).
Round-3 findings from Magi.
Both snippet players now keep a source assigned whenever in view (preload='none'
so nothing downloads until asked), gating only autoplay on reduced motion — so a
reduced-motion visitor can press play/unmute instead of being left with an inert
poster. HoverVideo renders a control on hasAudio={false} cards too (a play/pause
toggle), and ReplicaCompare no longer calls play() on a source it just removed.
Gave ReplicaCompare's button the same aria-pressed + focus-visible as HoverVideo.
Round-2 finding from Magi (#1) and Rames.
ReplicaCompare now assigns/decodes its reference+replica only near the viewport
and releases both (pause + removeAttribute + load) on exit, closing the last
eager-load surface from Magi's #5. Sync + reduced-motion guard preserved.
The reference and replica play on one shared clock; a single Instagram-style
button unmutes the reference (its original audio), the replica stays silent.
Reference videos re-encoded with audio on the CDN. The component honours
prefers-reduced-motion on both edges, per the docs-snippet-motion guard.
ukimsanov