fix(stt): track transcript timing provenance#5285
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Preserve provider word timing metadata through batch persistence and transcript rendering, request OpenAI Whisper word timestamps, and keep transcript-only synthetic timings from driving seek clicks.
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Preserve provider word timing metadata through batch persistence and transcript rendering, request OpenAI Whisper word timestamps, and keep transcript-only synthetic timings from driving seek clicks.
Note
Medium Risk
Touches STT ingestion/persistence and transcript rendering behavior, including provider adapter output and click-to-seek gating; mistakes could impact transcript playback seeking or metadata compatibility across stored transcripts.
Overview
Adds per-word timing provenance via new
~/stt/timinghelpers and threads this metadata through batch ingestion (transformWordEntries/batch listeners), Tinybase persistence (useRunBatch), and transcript rendering types (SegmentWord).Batch providers now emit/propagate a
timing_source(OpenAI requests word timestamps for Whisper; OpenAI text-only/stream results no longer synthesize words and are markedsynthetic_text; Mistral marks segment-interpolated timings), and the UI disables word click-to-seek + hover affordances for non-seekable (synthetic_text) words while ensuring segment stability comparisons account for timing source.Rust-rendered transcript segments now reattach the original word metadata after rendering (
render-transcript.ts), with updated tests covering the new metadata expectations.Reviewed by Cursor Bugbot for commit 96c6d7f. Bugbot is set up for automated code reviews on this repo. Configure here.