[scbrown]

Replaces the avatar-prototype skull attempts, which read as a flat grey helmet, with a skull drawn in pixelsrc that follows reference-skull.jpg.

What's in examples/skull/

• skull.pxl: the bone palette, the skull_cranium + skull_jaw sprites, open-jaw poses, compositions and the skull_talking animation. It's 40x40 on a transparent background.
• Traits from the reference: 3/4 view facing right, a rounded cranium swelling back-left, a warm bone ramp (cream, beige, tan, umber), a dark outline, angular orbits with lighter inner walls, a notched nasal cavity, a cheekbone plane, a shadowed temple, and a separate mandible with individual teeth plus a see-through mouth corner.
• Renders: skull.png (1x), skull_8x.png, skull_talking.gif (8x; closed, ajar and open, with the jaw hinged at the ear), and skull_comparison.png (built by compare.py).
• README.md has the render commands. reference-skull.jpg moved here from examples/avatar-prototype/.
• The old skull*.pxl sources and their PNG/GIF renders are removed. Nothing else in the repo referenced them.

GAPS.md

Five compiler gaps came up while drawing this. Each has a minimal repro in examples/skull/GAPS.md:

1. Region paint order is random unless every region has z. regions is a HashMap, and 6 renders of the repro gave 3 different PNGs.
2. auto-outline, repeat, transform, jitter, round and the x/y ranges are parsed and then silently ignored.
3. fill: \"inside(X)\" picks its seed at the bounding-box centre, so it can flood the outside of a concave shape. The documented seed: [x, y] isn't wired up.
4. Compositions can't offset a layer. They ignore a derived sprite's shift, and the documented {sprite, x, y} layer renders nothing. Because of this, the jaw poses are written out in full.
5. Derived (source:) sprites still require palette.

Testing

• pxl validate is clean, and pxl render --strict -c skull renders with no warnings.
• Under cargo test, everything passes except install::tests::test_install_skips_cached. That test also fails without this branch's changes: this PR only touches examples/, and the failure is in the install module.

🤖 Generated with Claude Code

https://claude.ai/code/session_01PXBCFZMofE9EGKzo8J2YKJ