Fix Cold Open

fix-cold-open

Deduction-targeted repair of the cold-open swipe-gate defect, driven by grade-clip's grade.json. The single highest-ROI move on the backlog: converts a face_withheld / cold-open-b-roll FIXABLE clip to uploadable without a 30-step re-pipe.

Usage

fix-cold-open.sh <clip.mp4> [grade.json]

• grade.json is auto-found if omitted: <clip>.grade.json, then (for in-chain clip_NN.* inputs) clip_NN.final.grade.json / clip_NN.grade.json.
• Reads grade.json's fix_routes (the EXACT vocabulary from SELECTION-SUITE-CONTRACT.md) and dispatches the gated ops.
• Writes a repaired .mp4 only when an op actually changed pixels, a .fixmeta signature, and a <clip>.fix.json report: {mode, ran:[routes], skipped:[{route,reason}], output, rerun_recommended:bool}.

Modes (FIXCO_MODE=preventive|curative, default auto)

PREVENTIVE (in-chain, primary deliverable) — runs on clip_NN.broll.mp4 / .brolled.mp4 where the 16:9 source (clip_NN.src16.path), .vert.fillplan.json, .broll_plan.json, and the clean pre-b-roll vertical (.sw.mp4 / .zoom.mp4 / .jc.mp4 / .vert.mp4) all live in work/<id>/. Here every op is clean. Output: clip_NN.fixed.mp4.

CURATIVE (standalone backlog) — a finished output/<src>/x.mp4 usually has NO co-located sidecars and the face is already BAKED into pixels inside a b-roll cutaway. It cannot be recovered without the 16:9 source. When the source/plans are NOT co-located, fix-cold-open emits rerun_recommended and makes NO pixel change — it never fabricates a fake repair (re-cropping the already-vertical frame toward a face that isn't there would just zoom into the b-roll, a regression). If work/<id> artifacts ARE co-located (e.g. an in-chain stem), it repairs in place. letterbox is always rerun_recommended (old render, structurally non-repairable).

The gated ops (in order)

1. shot0_repunch — fillplan.shots[0].kind != "face" (the face-withheld defect). Re-runs fill-vertical on the 16:9 source (src16.path). This RE-RUNS face detection — identity clusters are NOT persisted, a real per-clip cost, flagged in logs. Adopted only when the new shot0 comes back kind == "face"; the re-punched vertical becomes the clean base for the b-roll re-composite that follows.
2. broll_open_truncate — drops every broll_plan.picks window overlapping [0, FIXCO_OPEN_GUARD_SEC] (default 2.2s) and re-runs broll-composite onto the clean pre-b-roll vertical so frame 1 is the speaker, not a cutaway. (Also the carrier for a shot0_repunch result.)
3. credit_rerender — re-fires brand-overlays (ingest.json co-located) for the credit-lit-at-open defect.
4. card_rerender — re-fires title-transition (title.txt co-located) for the centered-blocking-card defect.

If shot0_repunch succeeds but there is no b-roll carrier to re-composite onto (so the new framing exists but lacks the downstream caption/title/brand chain), the skill surfaces rerun_recommended rather than ship a caption-less clip — honest about what a standalone pass can and can't finish.

Knobs

• FIXCO_OPEN_GUARD_SEC (default 2.2) — a b-roll pick overlapping [0, this] is a cold-open cutaway → truncated.
• FIXCO_MODE = preventive|curative (default auto: preventive when source/plans co-located, else curative).

Guarantees

• NON-FATAL — missing input, missing grade, unreadable video, or any sub-skill failure → input untouched, exit 0, honest report.
• No fabrication — never produces a fixed.mp4 unless an op actually changed pixels; never re-crops toward a face that isn't in the pixels.
• Idempotent — .fixmeta (mtime of clip+grade, guard, mode, routes) → 2nd run is a cache hit.
• Owns only its dir — re-fires existing skills (fill-vertical, broll-composite, brand-overlays, title-transition) by their published .sh contracts; never edits them.