v0.4.0

A frozen corpus thaws, procedures become skills, and cuts land on the beat.

Upgrading

The promise from v0.3.0 is delivered: legacy workspaces promote in place.
v0.3.0 made pre-revision workspaces read-only for new evidence and deferred
in-place promotion because the obvious implementation destroyed the data it
was meant to save. va rebind (ADR-0006) now backfills a frozen workspace
into revision binding: dry-run by default, apply re-probes the source and
journals the transition. When the source media is gone the tool refuses —
a rebind without re-measurement would bind evidence to nothing, so those
workspaces stay read-only by design and va audit keeps naming the split.

Understanding → skills

• Procedure knowledge layer. Recurring task-*/tool-* tagged steps
  compile into per-task procedure pages with timestamp anchors and an
  explicit evidence enumeration per step (visual_verified / speech_only /
  agent_estimated) — the execution-critical distinction, since transcripts
  recover procedure skeletons but not exact tokens (menu paths, values,
  commands).
• Approval-pending skill drafts. va skillgen compiles promoted
  procedures (3+ recurring videos) into skill drafts whose execution steps
  come from visually grounded checkpoints only; speech-only steps and
  precision warnings land in a mandatory known-weaknesses section. Drafts
  stay inactive until a human approves.
• Intent-coherence gate. A task whose sources disagree on tooling does
  not promote: tool tags form a strict-majority consensus, and a source
  sharing nothing with it blocks the draft until retagged or split —
  mixed-purpose corpora silently corrupting execution values is the failure
  this closes. va skillgen --route reports, per task, which gate still
  blocks promotion (draft / blocked-intent / needs-workspaces).
• va audit grew matching axes: procedure maturity, evidence distribution,
  visually unconfirmed exact tokens, and image-index consistency.

Editing

• Beat-quantized rhythm lane. va beats extracts a fixed-tempo beat
  grid (beats.json: bpm, beat times, 1s energy arc) from a music track;
  va beat-eval measures every output-timeline join of a sequence against
  the nearest beat and gates at p90 |offset| <= 40 ms by exit code. Its
  --snap output is a proposal only — applying it is a new sequence
  revision, so the decision ledger remains the only writer.
• The skill surface now carries the montage grammar that goes with it:
  Kuleshov re-contextualizing, one-point push-ins, chapter letterboxing,
  and an isolated grade layer.

Search

• Persistent BM25 index. .tca-search-cache.db is a
  fingerprint-incremental FTS5 inverted index (word + trigram, RRF-fused)
  with hybrid Korean recall; warm corpus queries drop from ~114 ms to
  16–23 ms. Exact tokens are indexed, a majority-coverage fallback catches
  scattered-term queries, and rank ties break understanding > screen >
  transcript.

Story Map and view

• Story Map. A read-only projection of both ledgers onto one
  proportional timeline: checkpoint tracks with grounding cross-highlight,
  an edit lane with cut provenance back to source spans (excluded regions
  stay visible), rejected alternatives, and conditional speaker ribbons.
• The corpus browser renders the edit ledger (cuts, rejected alternatives,
  evidence anchors), keeps human-facing Korean surfaces consistent, and
  gates serverless operation, legibility and render performance with
  regression tests.
• va ask answers its supported count intent with a canonical evidence
  envelope projected to Korean/English human text or compact agent JSON —
  evidence is computed once, uncertainty intervals are explicit, and
  count: 0 never claims "none".

Observability and integrity

• Frozen-corpus state is a first-class surface: audit names bound versus
  read-only workspaces instead of letting writes fail later.
• Mixed-form videos (narration + long silent stretches) are detected at
  brief time, so a timelapse segment is not covered by one
  transcript-shaped checkpoint.
• Wiki slugs derive from labels character-escaped and injectively — two
  labels can no longer race for one filename — and slug reassignment is
  detected by a regression gate.
• A real-corpus smoke script joins the verification procedure, observing
  scale that synthetic fixtures cannot.

Install

git clone https://github.com/mupozg823/timecode-agent.git && cd timecode-agent
uv tool install --python 3.12 .          # add '.[diarize]' for pyannote diarization

Requires ffmpeg/ffprobe on PATH, plus yt-dlp for URL ingest. See the
README
(한국어).

Full Changelog: v0.3.0...v0.4.0