Conciseness

Mostly dense, decision-oriented content (technique mapping tables, depth-level spec table, non-negotiable rules) with little explanation of things Claude already knows — but there is padding and redundancy: 'You are now a world-class epic design expert', 'Never build a flat, static page when this skill is active', and Quick Rules 0a/0b restating Step 1.B almost verbatim. Fits 'efficient; minor instances of over-explanation that could be trimmed'; not 5 because the persona flourishes and the duplicated asset-inspection rules cost tokens without adding guidance.

Actionability

Concrete and executable in the right places: a full reduced-motion CSS block, a copy-paste HTML section architecture, the validation command 'node scripts/validate-layers.js path/to/index.html', the GSAP CDN URL, and request-to-technique decision tables. However some guidance is naming-only (e.g. 'Split converge + Word lighting', 'DJI scale-in pin' are named in tables with no inline code or file that exists to define them), and the positioning recipe uses placeholder values ('right: calc(50% - [hero-half-width] - [gap])'). Fits 'mostly executable guidance with minor gaps'; not 5 because the common cases cannot all be executed from what is actually present.

Workflow Clarity

A clear, well-sequenced workflow (Mode selection → Steps 1–5 → validation) with real checkpoints: 'State your decisions to the user before building', 'get confirmation before treating any background as a problem', and a final validation step listing what is checked. Fits 'clear sequence with most checkpoints present; minor validation gaps'. Not 5 because there is no feedback loop — the Validation section says to run the script but never says what to do when it fails (fix and re-run), which the rubric treats as required for an explicit validate step.

Progressive Disclosure

The in-file structure is genuinely good — a Reference Files table with a 'When to Read' column, one-level-deep references, overview-level inline content. But scoring against the actual bundle: none of the 14 referenced files exist (references/asset-pipeline.md, references/depth-system.md, all 9 reference docs, scripts/inspect-assets.py, scripts/validate-layers.js, assets/hero-section.html/css/js are all absent), so every pointer is a dead end and the promised detail is unreachable. Fits 'some structure but could be better organized'; not 4 because 'references mostly clear' fails when the referenced targets are missing from the bundle, and not 2 because the SKILL.md body itself is well-organized and keeps only overview content inline.

Specificity

The description lists many concrete capabilities — 'scroll storytelling, parallax depth, text animations', 'clip-path reveals, text that flies in from sides, words that light up on scroll, curtain drops, iris opens, card stacks, bleed typography', plus 'Always inspects, judges, and plans assets before coding' — comprehensive rather than minor-gap coverage, matching the anchor for multiple specific concrete actions. It is not a 4 because coverage of actions is broad and specific, not leaving minor gaps.

Completeness

Both halves are explicit: what ('Build immersive, cinematic 2.5D interactive websites using scroll storytelling, parallax depth, text animations, and premium scroll effects — no WebGL required') and when ('Use this skill for any web design task… Trigger on phrases like…'). This mirrors the anchor that clearly answers both what and when with concrete trigger phrases; a 4 would need the 'when' to be less explicit, which it is not.

Trigger Term Quality

Natural phrases users would actually say are well covered: 'landing pages', 'hero sections', 'parallax', 'sticky sections', 'make it feel alive', 'Apple-style animation', 'immersive', 'scrollytelling', plus technique-level synonyms like 'section overlaps' and 'floating products between sections'. Matches the comprehensive-synonyms anchor; a 4 would require noticeably missing natural terms, which is not the case.

Distinctiveness Conflict Risk

The 2.5D/scroll-effects niche itself is distinct, but the claims 'Use this skill for any web design task' and 'Use aggressively for ANY web design task' widen it to all web design, overlapping general web-design, UI, and landing-page skills — matching 'somewhat specific but could still overlap with similar skills'. Not a 4 because the explicit 'ANY web design task' instruction creates more than minor overlap risk; not a 2 because the technique vocabulary (parallax depth, scrub, clip-path reveals) still anchors it to a recognizable niche.