Fix comp gate evidence and stale plate approvals

Measure declared region bounds, keep raw and effective verdicts distinct,
and use active blockers for repair feedback. Revalidate plate receipts
against current asset, region, and comp hashes; require an explicit quoted
comp-authority downgrade for force overrides.

Add regressions for missing assets, copied comp pixels, repeated failures,
generic delegation, and stale reports. Preserve fidelity thresholds.

AI assistance: implemented and validated with OpenAI Codex.

skill/reference/new-work.md

@@ -109,7 +109,7 @@ The comp-led path is a frontier-tier job: it asks the builder to hold a measured
 
 1. **spec.** Measure the comp: `impeccable comp-spec --comp <comp> --grid` writes a coordinate grid over the comp; open it, name every salient region by grid span in a regions file (text and control regions snap to the largest ink mass inside their span, so a headline named B1:E4 measures as the headline and not the column beside it; `snap: false` keeps the span, and an explicit `box` is taken as drawn) (kind `plate` / `image` / `texture` for anything painted: every illustration, photograph, figure, product object, and material texture; `text` / `control` / `chrome` for what code draws; every region carries a `note` saying what the comp shows there, which the plate prompt and the gate messages read), and run `impeccable comp-spec --comp <comp> --regions <file>`. The spec carries each region's box, sampled palette, and medium; `impeccable comp-spec --print` is the build's reference from here on. Type is measured, not guessed: `impeccable font-match --measure <text region>` reads the comp's cap height, width class, and weight off the pixels, and `impeccable font-match --rank <region> --text "..."` takes its candidates from a fingerprint index of the Google Fonts catalog (the nearest faces to the crop's shape) plus any names you pass with `--candidates`, renders them at that cap height with the region's words, and ranks them by fingerprint distance (its `USE` line is the CSS; its proof sheet shows the comp over the top three); with no browser resolvable it records the catalog's nearest face and says the size is estimated, which is still the choice to build on. Do not install a browser to rank, and never write a `chosen` face into the spec by hand: the gate accepts only what font-match wrote. The spec gate refuses to close until the lead text region is measured and ranked. A region note that describes painted material (a diagram, drawing, photograph, texture) under a code kind is refused at the spec: reclassify it as a plate, or reword the note if code really draws it. The script refuses a regions file that leaves comp ink unnamed (callouts, a parts table, a notes block): what is never named can never be missing, so everything the comp shows gets a region. It also refuses a `text` / `control` / `chrome` region larger than a quarter of the comp: that is a column, not an element, and a column scored as one region hides the plates, tables, and notes inside it. Name each element inside it (`container: true` only when it truly is one undivided element). Anything drawn is a plate: an inline SVG past an icon's budget (a diagram, notation, leader lines with arrows, a "quick approximation" of the artwork) is refused at the hero; icon-sized SVG (under 64px, a few paths) is fine, and a chart the page draws from data at runtime is a chart, not an illustration. Callout lines and arrows that annotate a drawing belong to that drawing's plate, with only their labels set as text. A crop of the comp is never a plate (the plates gate refuses a file that is a resample of the comp region: the comp's grain, its neighbours' edges, and its resolution would ship as the artwork); the crop is the reference the plate is generated from. A plate region's box has to hold its whole artwork with a margin: the spec measures the artwork's contact with the box edges and refuses a box that cuts through it (`bleed: true` only when the page really crops it there), because a plate placed with `object-fit: cover` on such a box shows the artwork minus the side the box lost. Anything not in the spec does not exist on the page: no borders, rules, containers, or chrome the comp does not show. Only three concessions exist: fonts (the closest obtainable face), icon glyphs (close enough, exact if the user chose an icon library; this covers the pictogram only, never a control's chrome, so a chevron, an arrow, a dropdown's border and fill, a button's shape are the comp's), and genuine defects in the comp such as spelling errors. <!-- rule:skill-comp-spec -->
 2. **plates.** Every raster region ships as a plate: an illustration, photo, or figure regenerated at asset resolution from its comp crop, UI text removed, at its `plate` path (isolated ink, figures, or objects use native transparent PNG so they sit on the page's own ground; photos and textures stay opaque); a texture (paper, cloth, grain) is a clean patch of the comp region mirror-tiled to size, generated only when no clean patch exists. `impeccable comp-spec --crop <id>` writes the reference; save `impeccable comp-spec --plate-prompt <id> --background transparent` to a prompt file for a cutout, or use `--background opaque` otherwise. Prefer the harness-native image tool with that crop and prompt, then `impeccable embed-prompt <plate> --prompt-file <prompt.txt>`. The API fallback is `impeccable generate-image --ref <crop.png> --prompt-file <prompt.txt> --out <plate.png> --size <WxH> --quality high --background transparent` (use `--background opaque` for full-frame assets); create the output directory first. Verify actual alpha, white foregrounds, fine edges, and clear holes on light and dark grounds; do not chroma-key native output. The plates gate scores the assets against the comp; also inspect placement and scale visually. With parallel subagents, spawn the shipped asset producer (`impeccable-asset-producer`; `impeccable_asset_producer` in codex; `/impeccable-asset-producer` in Cursor; on GitHub Copilot say "Use the impeccable-asset-producer agent") with the spec path and let it produce them all; without subagents, produce them here. A crop of the comp is a reference, never a shipping pixel. The gate checks every plate exists, is at least 1.5x the region's size, and reads as the region. Page code waits for this gate: a page written before its plates exist is a page that draws its material in CSS. A single-file deliverable changes nothing here: the plate is produced the same way and inlined as a data URI. `--force` exists for one case only, the user downgrading the comp's authority in words you quote in `--reason`; the script refuses every other reason. <!-- rule:skill-plates-before-page -->
-3. **hero.** `impeccable build-phase scaffold` first: it writes the measured layout as CSS custom properties (`.impeccable/build/scaffold/layout.css`: `--r-<id>-x/y/w/h` in % of the comp, plus cap height, font-size, family, and weight where measured) and a reference page (`hero-reference.html`) with every region at its box and every plate placed. Bind the numbers to your own semantic structure, an element per region; the reference is a check on positions, never the page, and overlapping boxes are overlapping boxes. Then build only the first viewport, at the comp's own dimensions, the comp's words copied verbatim (the user approved that comp with those words; rewording is a stated decision after the hero passes, never a silent one inside it), every text region sized from its measured cap height and set in its ranked face, plates first: place every plate at its spec box (`object-fit: cover`, an `<img>`, a background image, or an inlined data URI named for it) before any text or control, capture into `.impeccable/review/hero-repro.png`, run `impeccable build-phase record hero` once so you see the plate regions read as match before any text exists, then lay the semantic layer over the plates from the spec's palette and boxes and advance. The gate first refuses while any plate is unreferenced by the source, then runs `impeccable comp-diff`, writes `.impeccable/review/diff/hero/` (side-by-side, heatmap, one paired crop per region, `report.json`), and passes at 72% overall with no hard veto outstanding (a missing region, a contradicted plate or text block, an SVG illustration, a clipped plate, invented ink block at any score); above the bar, the numeric readings become advisories printed with the pass, and the polish pass before responsive is where they get fixed: the gate also reads each text region's cap height, line count, weight, ink colour, and position against the comp, each chrome strip's height off its rule, and the frame for ink where the comp is calm (a kicker, an extra nav item, a divider), and says each miss as a number ("cap height 78px in the build, 103px in the comp"); those numbers are the edit. When it fails, open the region crops it lists, in order, before editing: a region scored `missing` needs its material, `contradicted` needs its structure re-derived from the spec box, `drift` is where size and spacing edits belong; the gate refuses a third attempt that only nudges values on the same region. This is where the run's ambition is won or lost, and a retry here costs minutes where a rebuild verdict at the finish costs the run. <!-- rule:skill-hero-gate -->
+3. **hero.** `impeccable build-phase scaffold` first: it writes the measured layout as CSS custom properties (`.impeccable/build/scaffold/layout.css`: `--r-<id>-x/y/w/h` in % of the comp, plus cap height, font-size, family, and weight where measured) and a reference page (`hero-reference.html`) with every region at its box and every plate placed. Bind the numbers to your own semantic structure, an element per region; the reference is a check on positions, never the page, and overlapping boxes are overlapping boxes. Then build only the first viewport, at the comp's own dimensions, the comp's words copied verbatim (the user approved that comp with those words; rewording is a stated decision after the hero passes, never a silent one inside it), every text region sized from its measured cap height and set in its ranked face, plates first: place every plate at its spec box (`object-fit: cover`, an `<img>`, a background image, or an inlined data URI named for it) before any text or control, capture into `.impeccable/review/hero-repro.png`, run `impeccable build-phase record hero` once so you see the plate regions read as match before any text exists, then lay the semantic layer over the plates from the spec's palette and boxes and advance. The gate first refuses while any plate is unreferenced by the source, then runs `impeccable comp-diff`, writes `.impeccable/review/diff/hero/` (side-by-side, heatmap, one paired crop per region, `report.json`; `raw-report.json` preserves the uninterpreted measurements). The report and crop labels use the gate's verdicts; `gate.reasons` lists the remaining blockers even when a region is called drift. An accepted plate is revalidated if its file, measured region, or comp changes. The gate passes at 72% overall with no hard veto outstanding (a missing region, a contradicted plate or text block, an SVG illustration, a clipped plate, invented ink block at any score); above the bar, the numeric readings become advisories printed with the pass, and the polish pass before responsive is where they get fixed: the gate also reads each text region's cap height, line count, weight, ink colour, and position against the comp, each chrome strip's height off its rule, and the frame for ink where the comp is calm (a kicker, an extra nav item, a divider), and says each miss as a number ("cap height 78px in the build, 103px in the comp"); those numbers are the edit. When it fails, open the region crops it lists, in order, before editing: a region scored `missing` needs its material, `contradicted` needs its structure re-derived from the spec box, `drift` is where size and spacing edits belong; repeated attempts do not clear unresolved blockers. This is where the run's ambition is won or lost, and a retry here costs minutes where a rebuild verdict at the finish costs the run. <!-- rule:skill-hero-gate -->
 4. **sections.** Build the rest of the surface inside the spec's system: the same corner language, line weights, and palette, and nothing the comp never shows. Where the comp does not cover a region, it inherits the recorded system.
 5. **motion.** The signature interaction, reveals, and motion, orchestrated once rather than scattered.
 6. **responsive.** The other viewports, and the first viewport at common desktop widths (1280 to 1600), not only at the comp's exact size: fluid columns, no fixed-pixel grid that wraps a hundred pixels narrower. Capture `desktop.png` (1440 wide, full page) and `mobile.png` (390 wide) into `.impeccable/review/`; the gate diffs the desktop capture against the comp and refuses a first viewport that only held at the comp's width. A comp'd surface that is mobile-first was comped portrait; the plates were produced for that frame.