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Christian PillsburyandClaude Opus 4.8
05a0a6452d
Rebuild relocation from the config-bundle (createRelocation + self-discriminating
origin-discoverer) into a DOM-free per-source reactor plus DOM config-pipeline
steps, per the presentation-timeline design + review.
- behaviors/establish-start-media-time.ts (new, DOM-free): the reactor — 3 states
(inactive clears the transient slot per source / monitoring runs the injected
deriveStartMediaTime seam -> writes Track.startMediaTime / established disables it).
Owns mediaContainerData on state; selection optional/defensive; never touches pipelines.
- behaviors/dom/relocation-steps.ts (new): relocationMessagePipelines — a plain
config step array. discover writes state.mediaContainerData; stamp reads the
track's own discovered origin (Tier 1) -> timestampOffset. Steps read composition
state from call-time deps; coordinate with the reactor only through the slot.
- segment-loader: StepDeps widened with the composition {state,context,config}
(opaque conduit; the loader never reads them).
- primitives/head-peek.ts (new): generic eager head-peek (replaces origin-discoverer).
- media/types: Track.startMediaTime + MediaContainerData.
- setup-buffer-actors: relocation pipelines from config; threads composition deps.
- engine: composes the reactor + bakes relocationMessagePipelines + mediaContainerData
+ deriveStartMediaTime config, comment-marked for easy removal.
- Deleted relocation.ts, origin-discoverer.ts. Doc + backlog updated.
Deferred (backlog): per-type keying; non-0th-segment origin (#4 — non-zero starts
currently mis-relocate); tier-agnostic apply; text-cue relocation; Tier 2 min;
audio-only wiring.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>