feat(rasterize): SVG to PNG without Cairo, fonts pinned for ImageMagick

.claude/settings.json

@@ -10,6 +10,10 @@
       "Bash(python3 -m muriel.oklch:*)",
       "Bash(.venv/bin/python -m muriel.oklch:*)",
       "Bash(uv run python -m muriel.oklch:*)",
+      "Bash(python -m muriel.rasterize:*)",
+      "Bash(python3 -m muriel.rasterize:*)",
+      "Bash(.venv/bin/python -m muriel.rasterize:*)",
+      "Bash(uv run python -m muriel.rasterize:*)",
       "Bash(cairosvg:*)",
       "Bash(.venv/bin/cairosvg:*)",
       "Bash(python -m cairosvg:*)",

CHANGELOG.md

@@ -8,6 +8,21 @@ version numbers follow [Semantic Versioning](https://semver.org/).
 
 ### Added
 
+- **`muriel rasterize` — SVG to PNG without Cairo.** The critique agent's
+  rasterize step called `cairosvg`, which on Windows installs and then fails
+  at import (no `libcairo-2.dll`). `muriel.rasterize` keeps cairosvg first
+  and falls back to ImageMagick 7 (`magick`), whose Windows build carries
+  librsvg and Cairo itself. Its librsvg reads only the first family of a
+  `font-family` stack and rounds weight 600 to Bold, so before the render
+  every stack is resolved against `magick -list font`. The CSS keywords muriel's
+  generators lead with (`ui-sans-serif`, `system-ui`, `ui-monospace`)
+  resolve to the faces a browser picks. On Windows, intermediate weights
+  become their named faces ("Segoe UI Semibold"), chosen by the CSS
+  weight-matching rule. Prints the backend, every substitution, leftover
+  font fallbacks, and a note when `<image>` elements are present, since
+  ImageMagick's librsvg drops them. The critique agent and the repo's
+  permission allowlist now point at it.
+
 - **`muriel.collection` accepts a clip's `video` for Wunderkammer's next
   release.** Wunderkammer's `feat/video-tiles` (4c86e79) adds an optional
   `video` to a clip: one http(s), `blob:` or relative URL, never `data:`,

muriel/__main__.py

@@ -19,6 +19,7 @@
     muriel diagram-check fig.svg           # a11y + label + contrast gate
     muriel dimensions                      # print the dimensions registry
     muriel heroshot in.png out.png --tilt 12
+    muriel rasterize fig.svg -o fig.png    # SVG to PNG, cairosvg or ImageMagick
     muriel tilt-shift raw.png hero.png
     muriel venn spec.json out.png
     muriel styleguide examples/muriel-brand.toml --css
@@ -60,6 +61,7 @@
     "import-tokens":  ("muriel.design_tokens_import",         "Convert a DTCG / open-codesign tokens.json into a muriel brand.toml"),
     "import-corpus":  ("muriel.tools.corpus_audit",          "Audit a DESIGN.md corpus through design_md_import + 8:1 floor"),
     "palettes":       ("muriel.palettes",                   "List / generate / validate categorical palettes (CVD + contrast)"),
+    "rasterize":      ("muriel.rasterize",                  "SVG to PNG for a visual audit: cairosvg, else ImageMagick with fonts pinned to installed faces"),
     "smartcrop":      ("muriel.tools.smartcrop",            "Saliency-aware crop solver (edges + optional faces / text / saliency)"),
     "squint":         ("muriel.squint",                     "Dimension-scaled blur ladder + thumbnail companions — does hierarchy survive degradation?"),
     "styleguide":     ("muriel.styleguide",                 "Load a brand.toml; print / derive CSS / matplotlibrc / contrast audit"),