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Christian PillsburyandClaude Opus 4.8
24fa36e695
Decompose the seek-to-live-edge behavior (which coupled three concerns) into:
- liveWindowFor (media/live-window.ts) — a pure derivation of the live window
{start,end,targetDuration}, or null for VOD/ended/unresolved. The single
source of truth, centralizing all inertness so consumers don't re-derive.
- syncLiveSeekableRange (behaviors/dom) — declares setLiveSeekableRange on each
window slide, including while paused (the seekable range must stay current
regardless of play state).
- seekToLiveEdge — now just the one-time HOLD-BACK seek + the window-exit guard,
consuming liveWindowFor; sheds the seekable/duration writes (keeps the
mediaSource open-gate so the seek lands in the declared range).
Composed syncLiveSeekableRange before seekToLiveEdge to preserve the
declare-before-seek ordering (a seek outside seekable is clamped). Behavior-
preserving; tests redistributed (7 liveWindowFor + 14 seekToLiveEdge + 5
syncLiveSeekableRange). Deferred follow-ups: clearLiveSeekableRange on
termination; duration-ownership cleanup vs updateMediaSourceDuration; B's
seeked-latch source-reset; window-derives-from-accumulated-segments-while-paused.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>