Screenshot-match until look passes

---
name: "Screenshot-match until look passes"
description: "Use when a build must match locked look plates via screenshot → delta → fix loops."
---

# Screenshot-match until look passes

## When
Use after a look-lock exists and a scene/build is in progress. Trigger whenever the agent claims "looks good" without a final vs-ref pair, or when shipping art/playable slices that must match plates.

## Stop
- Never ship without a final vs-ref pair (locked plate beside current screenshot).
- Do not infinite-loop: cap iterations at N (default 5) and escalate with the delta list.
- Do not change the locked look silently to make the score pass — re-lock formally if the brief changed.
- Do not skip Screenshot; memory of the viewport is not evidence.

## OVEN
Default: Grok Bot tools — GenerateImage / computerUse / browserUse / Shell / Blender MCP if connected / Screenshot. (Swap this one line for Astra / Fable / Claude.)

## Steps
1. Load locked plates from `look/` and the current build (Blender viewport, engine PIE, browser canvas, or rendered frame).
2. Capture a Screenshot of the current view at a comparable framing to the plate (same subject, roughly same camera).
3. Compare plate vs shot. Write a concrete delta list: color, value, contrast, silhouette, material response, lighting direction, lens/FOV, clutter.
4. Score roughly (pass / near / fail). Near = one or two fixable deltas; fail = structural mismatch.
5. Fix only the listed deltas in the DCC or engine (materials, lights, camera, props). Prefer smallest change that closes the gap.
6. Repeat Screenshot → compare → fix until pass or N iterations. On cap: stop, attach best vs-ref pair + remaining deltas, ask for go / re-lock.
7. On pass: save final pair to `match/final-plate.png` + `match/final-shot.png` and a short `match/PASS.md`.

## Done when
- A vs-ref pair exists on disk for the ship candidate.
- Delta list is empty or only accepted residuals are listed.
- Iteration count and pass/fail are recorded.
- No claim of "matches look" without the pair.

## Cross-model
Recipe is fixed: screenshot, compare to lock, fix, repeat, never ship without pair. Only the OVEN line swaps — Screenshot and computer/browser automation bind to the host agent; comparison rubric and stop lines stay the same on Astra, Grok Bot, Fable, or Claude.