--- name: spark-video-clip-review description: Per-clip quality reviewer + render retry state machine. After each rendered shot, score it on 6 axes via `bl omni` (qwen3.5-omni-plus), then decide ACCEPT / REJECT-and-rewrite / REJECT-and-escalate. Handles up to N retry rounds with auto prompt rewriting; escalates to spark-video-director when retries are exhausted. --- # Clip Review + Re-Render Skill — spark-video On-Set QA You are the **per-clip quality gate** of the pipeline. You run **after** each shot is rendered. You catch problems that only surface in the actual rendered MP4 — face drift, lip-sync mismatch, physics violations, style drift, etc. — and drive the retry loop. Set env vars before any work: ```bash export SPARK_VIDEO_PROJECT= export SPARK_VIDEO_EPISODE= export SPARK_VIDEO_SHOT= # the shot you're reviewing export SPARK_VIDEO_PHASE=review ``` ## Scoring is automatic — you drive the *judgment*, not the mechanics **`render_shot.py` now scores every clip itself.** As of the Zone-3 hardening, a successful render is immediately reviewed in the same tool call by `lib/review.py`: it builds the `bl omni` call, attaches the cast portraits for `shot.characters`, parses the 6-axis JSON, averages it, writes `reviews/-ver.json`, embeds the review into `shots_state.json`, and — on ACCEPT (avg ≥ threshold) — promotes the version to winner (`clips/.mp4`). You do **not** hand-build the `bl omni` call anymore, and you do **not** copy the winner clip. That deterministic spine cannot be skipped. What is left to *you* is exactly the judgment a script can't do: - read the REJECT `critique` and rewrite the prompt to fix the specific failure mode (face drift / dialog mismatch / physics …); - decide, when retries are exhausted, between best-of-N and re-cutting the shot group; - write the escalation report for the director. ## The state machine (single source of truth) For each shot the renderer hands you, run this loop: ``` ver = 1 while ver <= max_retry: # default max_retry = 3, env: SPARK_VIDEO_MAX_RETRY out = render_shot.py --shot ... # renders AND scores AND # auto-promotes winner on ACCEPT verdict = out.review.verdict # ACCEPT | REJECT | ERROR if verdict == ACCEPT: # render_shot already set winner_version + copied clips/.mp4. DONE. break elif verdict == ERROR: # the judge was unreachable / returned junk — NOT a content reject. # inspect logs/model_calls.jsonl; re-run render_shot (--force) or, if # the clip looks fine to you, accept it manually with --accept-version. handle and break or retry elif ver < max_retry: # REJECT — YOUR judgment here rewrite prompt from out.review.critique (bl text chat) # SPARK_VIDEO_PHASE=rewrite update scenes/scene-NN.json with the new prompt ver += 1 # next render_shot --force renders ver+1 else: # REJECT, retries exhausted best = highest-scoring attempt in shots_state.json render_shot.py --shot --accept-version # promote best-of-N write reviews/escalation-.md + needs_director_rewrite.json exit with escalation signal ``` The producer reads the escalation file and invokes the `spark-video-director` skill with it as input. ## How to render + review one attempt ### 1. Render (scoring happens automatically) ```bash export SPARK_VIDEO_SHOT=S01-002 export SPARK_VIDEO_PHASE=render uv run scripts/render_shot.py \ --shot $SPARK_VIDEO_SHOT \ --kind r2v --duration 12 \ --prompt "" \ --media projects/$SPARK_VIDEO_PROJECT/cast/陆辰/portrait1.png \ projects/$SPARK_VIDEO_PROJECT/movie-set/客栈大堂-夜晚/set1.png # stdout (JSON) now includes the review verdict: # {"shot_id":"S01-002","version":1,"video_path":"...","duration_s":12.0, # "provider":"bl","model":"happyhorse-1.0-r2v","elapsed_s":47.2, # "review":{"score":6.2,"verdict":"REJECT","breakdown":{...},"critique":"..."}, # "winner_version":null, # "next":"rewrite prompt and re-render (--force), or accept best-of-N ..."} ``` In one call the script: writes `clips/S01-002-ver1.mp4`, extracts the last frame, scores the clip on the 6 axes (auto-resolving cast portraits from `cast.json`), writes `reviews/S01-002-ver1.json`, embeds the review into `shots_state.json`, and — if `verdict == ACCEPT` — promotes the version to winner (`clips/S01-002.mp4`). **You only read the verdict from stdout.** You never write `shots_state.json`, build the `bl omni` call, or copy the winner clip. Opt-outs: `--no-review` skips scoring for one render; `VIDEOGEN_REVIEW_MODEL=""` disables it globally (falls back to the old manual `--accept-version` flow). `--characters A B` overrides which cast portraits feed the `cast_match` axis (default: storyboard's `shot.characters`). ### 2. The review record (written for you) `reviews/-ver.json` and `shots_state.json`'s `attempts[].review` carry the same object — this is what `viewer.html` (and a future progress console) renders: ```json { "shot_id": "S01-002", "version": 1, "score": 6.2, "breakdown": { "logic": 7, "proportion": 6, "physics": 7, "style": 8, "cast_match": 5, "dialog_attribution": 4 }, "critique": "0:00–0:03 钱夫人脸型偏离参考图(下巴宽 + 发际线高); 0:04 那句\"你这小蹄子\"应是钱夫人说的, 但视频里嘴动的是郭芙蓉, 属于台词错位 ...", "verdict": "REJECT", "ts": "" } ``` `verdict = "ACCEPT"` iff `score >= threshold` (default 7.0, env: `SPARK_VIDEO_REVIEW_THRESHOLD` / `VIDEOGEN_REVIEW_THRESHOLD`). The threshold is authoritative — the script ignores a lenient model verdict that disagrees with the arithmetic. A `verdict == "ERROR"` means the judge couldn't run (timeout / unparseable output); inspect `logs/model_calls.jsonl` rather than treating it as a content reject. ### 3. On REJECT — rewrite the prompt (this is YOUR job) ```bash export SPARK_VIDEO_PHASE=rewrite ./scripts/bl text chat \ --model qwen-plus \ --system "$(cat references/spark-video-clip-review/rewrite-system.md)" \ --message "Original prompt: \nScore: 6.2\nIssues: \nRewrite the prompt to fix the issues while keeping narrative intent unchanged. Output only the new prompt text, no explanation." # Update scenes/scene-NN.json's shot with the new prompt, then re-render # (the next attempt auto-scores again): uv run scripts/render_shot.py --shot $SPARK_VIDEO_SHOT --kind r2v \ --duration 12 --prompt "" --media ... --force ``` ### 4. Best-of-N when retries are exhausted ```bash # Promote the highest-scoring attempt (no re-render, no re-score): uv run scripts/render_shot.py --shot $SPARK_VIDEO_SHOT --accept-version 2 ``` Then write the escalation report (next section). ## Scoring rubric (6 axes) `bl omni` is asked for **six** sub-scores (each 0–10), then averaged into the headline `score`. Cast portraits for every character in `shot.characters[]` are attached so the model can match faces 1:1. | Axis | What it asks | |------|--------------| | **logic** | Does the action / cut / camera move match the script intent and the shot's `narrative_purpose`? Are continuity props respected? | | **proportion** | Anatomy, character size relative to environment, perspective, hands / feet / facial proportions. | | **physics** | Gravity, collisions, momentum, cloth, hair, fluid behaviour. | | **style** | Matches `lore.mood_anchor` / `visual_style` / `palette`. No `forbidden` term/asset visible. | | **cast_match** | Each visible character's face / hair / costume / build matches the **same-named cast portrait** passed alongside the video. Drift / wrong identity → low score. Named characters not in cast → low score. | | **dialog_attribution** | The character actually mouthing / voicing each line is the one the prompt assigned that line to. **A's line delivered by B / B's mouth moves for A's line** is a hard 0-3. Shots with no dialog → 10. | **Default threshold**: `7.0` (env: `SPARK_VIDEO_REVIEW_THRESHOLD`). The detailed rubric the rubric.md system prompt encodes lives in `references/spark-video-clip-review/rubric.md` (you should read / maintain that file separately; this skill summary points at it). ## Escalation — when retries exhausted After `max_retry` REJECT rounds, write a structured handoff for the director under `projects/

//reviews/escalation-.md`: ```markdown # Escalation to Director · S01-002 ## Three scoring rounds | ver | score | logic | prop | phys | style | cast | dialog | |-----|-------|-------|------|------|-------|------|--------| | 1 | 6.2 | 7 | 6 | 7 | 8 | 5 | 4 | | 2 | 6.5 | 7.5 | 6 | 7 | 8 | 6 | 4 | | 3 | 6.6 | 7 | 6 | 7 | 8 | 6 | 6 | ## Recurring issues - (List problems that appeared in all three rounds — one sentence with timecode + frame position) - ... ## Fix attempts already tried - ver2 → ver3 main prompt changes: ... Result: ... ## Suggested director changes - (Specific to storyboard.json fields — prompt / kind / duration / characters / seed / scene.description / set_id / props) - Priority order ``` Also write `projects/

//needs_director_rewrite.json`: ```json { "shots": ["S01-002"], "details": [ { "shot_id": "S01-002", "best_version": 2, "best_score": 6.6, "escalation_report": "projects/

//reviews/escalation-S01-002.md" } ] } ``` The producer reads this and invokes `spark-video-director` with the escalation report as input. After the director edits `scenes/scene-NN.json` and re-compiles, the producer runs `render_shot.py --shot --force --reset-attempts` and the loop restarts at ver=1. ## Where review records live ``` projects/

// ├── reviews/ │ ├── S01-001-ver1.json ← per-attempt scoring │ ├── S01-002-ver1.json │ ├── S01-002-ver2.json │ ├── S01-002-ver3.json │ └── escalation-S01-002.md ← only when needs_director_rewrite=true ├── clips/ │ ├── S01-002-ver1.mp4 │ ├── S01-002-ver2.mp4 │ ├── S01-002-ver3.mp4 │ └── S01-002.mp4 ← copy of winning version ├── shots_state.json ← canonical truth (only render_shot.py writes) └── needs_director_rewrite.json ← present only after escalation ``` `shots_state.json` shape: ```json { "S01-002": { "shot_id": "S01-002", "winner_version": 2, "winner_path": "<...>/clips/S01-002.mp4", "needs_director_rewrite": false, "attempts": [ {"version": 1, "status": "SUCCEEDED", "review": {"score": 6.5, ...}, ...}, {"version": 2, "status": "SUCCEEDED", "review": {"score": 8.1, ...}, ...} ] } } ``` ## Parallelism — fan out across chain groups The render_graph script produces parallel chain groups: ```bash uv run scripts/storyboard.py graph # Outputs JSON: [["S01-001","S01-002"], ["S02-001"], ["S03-001","S03-002","S03-003"], ...] # Each inner array is a chain group — must render sequentially internally # but groups can run in parallel. ``` When your harness supports parallel tool calls, fan out: one clip-review loop per chain group, all running concurrently. The default cap is `SPARK_VIDEO_MAX_CONCURRENCY=4`. Within a chain group, the loop is sequential because shot N+1's `use_prev_last_frame_as_first=true` depends on shot N's last frame. For full-episode batch rendering, use `render_all.py` instead of manually fanning out per chain group: ```bash uv run scripts/render_all.py --reset # Or after prompt rewrites: uv run scripts/render_all.py --rejected-only ``` It handles chain-group parallelism, media resolution, and first-frame chaining internally. You only intervene for prompt rewrites on REJECT. ## DON'Ts - ❌ Don't modify `storyboard.json` or `scenes/scene-NN.json` yourself (except via the auto-rewrite step, which targets one shot's `prompt` field). Structural changes are the director's job. - ❌ Don't override `winner_path` manually — `render_shot.py` maintains it. - ❌ Don't re-implement scoring by hand. `render_shot.py` already scores every render via `lib/review.py` (cast portraits, 6-axis parse, averaging, sidecar, promotion). Read the verdict from its stdout. The only reason to call the judge yourself is debugging. - ❌ Don't `--no-review` or set `VIDEOGEN_REVIEW_MODEL=""` to "speed things up". That silently drops the quality gate — the exact failure this hardening exists to prevent. Disable review only on explicit user request, and tell them. - ❌ Don't call `bl` directly — always use `./scripts/bl` so the call lands in `logs/model_calls.jsonl` (every prompt is part of the PE audit trail). - ❌ Don't escalate before exhausting `max_retry`. Trust the auto-rewrite. - ❌ Don't widen the threshold to mask problems. If the threshold is wrong for the project, change `SPARK_VIDEO_REVIEW_THRESHOLD` and tell the user. - ❌ Don't treat a `verdict == "ERROR"` as a content REJECT. It means the judge couldn't run — diagnose via `logs/model_calls.jsonl`, don't burn a rewrite round on it.