Conciseness

The ~1090-line body inlines hundreds of lines of API reference and full config-option listings (e.g., the complete VanillaTilt options block and six Vanta effect configs) that duplicate the bundle's references/ files, repeats the same requestAnimationFrame animate loop three times, and includes 'Core Concepts' sections explaining what each library is. Pinned version numbers (three@0.134.0, vanta@0.5.24, vanilla-tilt@1.8.1) are time-sensitive and not isolated in a deprecated section.

Actionability

Mostly executable, copy-paste-ready code: complete HTML setups for all three libraries, working React integrations with cleanup, and pitfall fixes like 'color: 0x23153c' vs string. Falls short of 5 because Pattern 2's icon grid calls createStarIcon and createCheckIcon which are never defined (only createHeartIcon is shown), leaving that example non-runnable as written.

Workflow Clarity

The body is organized as a reference menu (per-library setup, patterns, pitfalls) rather than a sequenced workflow — there is no guidance for choosing between libraries or ordering setup → integration → optimization for a given task. The pitfalls section provides implicit error-recovery (e.g., 'Zdog Not Rendering' causes/solutions), but no explicit checkpoints; not a destructive/batch skill so the cap-3 rule is not triggered, yet the sequence gaps keep it at 3.

Progressive Disclosure

The bundle provides references/zdog_api.md, vantajs_effects.md, tilt_patterns.md plus scripts/ and assets/, yet the body links to none of them — no reference, script, or asset file is mentioned anywhere. Meanwhile the equivalent API/config detail is inlined directly in SKILL.md, meaning the scripts (generate_zdog.py, setup_vanta.py) and starter assets are undiscoverable. This matches the anchor 'content that clearly belongs in separate files is inlined'; it avoids a 1 only because the body itself has clear section headers.

Specificity

The description names three concrete libraries and several specific actions ('adding pseudo-3D illustrations, animated backgrounds, parallax tilt effects'), but actions like 'decorative 3D elements, or subtle depth effects' are generic and partly repetitive of earlier phrases, leaving minor coverage gaps versus the comprehensive 5 anchor.

Completeness

Both questions are answered explicitly: the what ('Lightweight 3D effects ... using Zdog, Vanta.js, and Vanilla-Tilt.js') and the when with concrete trigger phrases in two forms ('Use this skill when adding...' and 'Triggers on tasks involving...'), matching the 5 anchor's pattern.

Trigger Term Quality

Good natural-term coverage: 'Zdog pseudo-3D, Vanta.js backgrounds, Vanilla-Tilt parallax, card tilt effects, hero section animations, or lightweight landing page visuals'. A few natural variations users might say are missing (e.g., '3D hover effect', 'tilt.js', 'animated hero'), so it falls just short of the comprehensive synonym coverage of the 5 anchor.

Distinctiveness Conflict Risk

Library-specific triggers (Zdog, Vanta.js, Vanilla-Tilt) give it a clear niche with minimal confusion risk, but 'hero section animations' and 'lightweight landing page visuals' are broad enough to overlap with general animation/CSS-skills, fitting 'mostly distinct; minor overlap risk with closely related skills' rather than the fully distinct 5 anchor.