Conciseness

The body is dense and operational with zero concept-teaching (no 'what is SVG' padding; it assumes Claude knows parallax, collision, IoU). However, the routing rule (code art is the last resort; image generation comes first) is restated in 'Do not use when', the 'Art source' paragraph, and all three host notes — minor duplication that could be consolidated. That matches anchor 4 ('Efficient; minor instances of over-explanation that could be trimmed') rather than anchor 5, and it is well above anchor 3 since nothing explains things Claude already knows.

Actionability

Fully executable throughout: a copy-paste Hello sprite ('python "<skill-dir>/scripts/render_pixelspec.py" --spec gem.pixelspec.json --output-dir out/gem-v1 --preview-scale 8 --strict-qc'), a Pipeline table mapping every need to an exact command with flags, pinned install commands ('python -m pip install "resvg-py>=0.5,<0.6"'), and explicit error semantics ('Success prints one JSON line; errors print "error: ..." and exit 1'). This matches anchor 5 ('fully executable; copy-paste ready; specific examples cover the common cases') — no pseudocode or vague direction anywhere.

Workflow Clarity

Clear sequences with explicit validation and feedback loops: a numbered Hello sprite walkthrough, a capability check with remediation ('If encoding.stdout fails, set PYTHONUTF8=1'), QA gates that fail closed ('with --strict-qc a failed check publishes nothing', tilesets 'seam-proven before they are published'), and a warn-fix-retry loop ('render_pixelspec.py warns half_cycle_duplicates ... fix the legs, or pass --allow-duplicate-half-cycle only after the review sheet shows the stride reads'). The Acceptance section adds a reporting checklist. This matches anchor 5 ('explicit validation steps; feedback loops for error recovery'); the anchor-4 profile ('minor validation gaps') does not apply.

Progressive Disclosure

Well-structured overview with one-level-deep, clearly signaled references: all ten linked reference files (pixelspec.md, svg-profile.md, rig-animation.md, fx-language.md, fx-runtime-contract.md, tiles-and-maps.md, layouts-and-parallax.md, style-envelope.md, rasterizers.md, schemas/codeart.schema.json) exist and are substantial, and detail is correctly split out of SKILL.md. However, the body points to an examples directory ('Examples to copy: examples/') that is not present in the bundle, and the pipeline/hand-off detail is excellent but the missing referenced path is a minor navigation gap — anchor 4 ('good structure ... minor organization gaps') rather than anchor 5, since scoring is against the actual bundle.

Specificity

Quotes: "pixel sprites from a PixelSpec, flat vector props, UI and icons from portable SVG, rigged characters with planted feet, FX with a JS runtime, seam-proven autotiles, playable top-down layouts with collision, stylized parallax and ambient plate motion - palette-exact, with QA and review sheets" — a comprehensive list of concrete, distinct capabilities with output qualities. It covers the full capability range (sprites, props, UI, icons, rigs, FX, tiles, maps, parallax, ambient, QA) with no generic filler, so it fits the anchor-5 'multiple specific concrete actions; comprehensive coverage' better than anchor 4 ('minor gaps in coverage').

Completeness

Explicitly answers both questions: what — "Draws game art from code, with no image model ... palette-exact, with QA and review sheets"; when — "Use only when the user explicitly asks for code-drawn art, or when generate2dmedia route_media.py finds no image or video route (no-route, exit 3)". It also adds negative triggers ("Not for painterly, detailed or likeness art, HD-2D plates or realistic fire, smoke or water") and a precedence rule, matching anchor 5 ('clearly and explicitly answers both what AND when with concrete trigger phrases') rather than anchor 4 where the 'when' could be more explicit.

Trigger Term Quality

Good natural keyword coverage: "code-drawn art", "pixel sprites", "UI and icons", "autotiles", "top-down layouts", "parallax", "game art" — phrases a game developer would plausibly say. It falls short of anchor 5 because it misses common synonyms and file extensions users would naturally use (e.g. "pixel art", "vector art", "sprite sheet", ".svg", ".png"), and spends tokens on internal jargon ("route_media.py", "exit 3") that no user would say, keeping it above anchor 3 ('missing common variations or synonyms') but below comprehensive.

Distinctiveness Conflict Risk

It carves a clear niche ("Explicit-only last resort", "Never the default") and names the competing skills it must not displace ("image generation (generate2dsprite, generate2dmap, video2dsprite) comes first"), plus explicit exclusions for painterly/likeness art. Third-person/imperative voice is used consistently with no first/second person. This is a clear niche with distinct triggers and minimal conflict risk — anchor 5; it is far more discriminating than anchor 4's 'minor overlap risk with closely related skills'.