Conciseness

The body is lean and imperative throughout — e.g., "Walk text nodes with TreeWalker; do not flatten the container with textContent or innerHTML" — with no explanations of concepts Claude already knows; both snippets are minimal and earn their place. This matches anchor 5's 'every token earns its place'.

Actionability

Concrete guidance dominates: specific defaults ("Hidden opacity: 0.12–0.3", "Blur: 4–10px"), real APIs (TreeWalker, GSAP ScrollTrigger with scrub, prefers-reduced-motion), and a preferred HTML structure. However, the JS snippet references undefined `progress`, `wordCount`, `index`, and `word` — it is a fragment rather than copy-paste executable — placing it at anchor 4 rather than 5.

Workflow Clarity

The sections form a coherent build sequence (Prepare the text → Map scroll to words → Set useful defaults → Preserve emphasis → Keep it readable → Clean up → Verify) and the Verify section is an explicit validation checklist ("inline links and emphasis, punctuation, repeated spaces, 200% zoom, 390/768/1440 widths... reduced motion, keyboard focus, screen-reader reading order, and teardown"). This is a non-destructive skill, so no feedback-loop cap applies, and it matches anchor 5's checklist criterion.

Progressive Disclosure

The body's references are clearly signaled and one level deep ("Use [demo/index.html](demo/index.html) as the working reference and [demo/PROMPT.md](demo/PROMPT.md)... Keep [REFERENCES.md](REFERENCES.md) as the links-only implementation source list"), but none of these files exist in the bundle — following any of them fails. Section organization is good, yet the dangling references leave navigation broken, which fits anchor 3 (structure present, references problematic) better than anchor 4's 'references mostly clear'.

Specificity

"Reveal marked-up text word by word as scroll progress advances, while preserving semantic inline links, emphasis, responsive line wrapping, and reduced-motion readability" names the domain and several concrete behaviors (word-by-word reveal, preserving links/emphasis/wrapping, reduced-motion support). It falls short of anchor 5 because these are facets of one core action rather than multiple distinct capabilities, but exceeds anchor 3's '1-2 concrete actions' scope.

Completeness

The description explicitly answers both: "what" ("Reveal marked-up text word by word as scroll progress advances, while preserving semantic inline links, emphasis, responsive line wrapping, and reduced-motion readability") and "when" ("Use for headlines, quotes, manifestos, product statements, onboarding messages, or editorial passages where scrolling should pace comprehension rather than simulate typing"), matching the anchor-5 pattern of concrete trigger phrases.

Trigger Term Quality

Natural phrases like "headlines, quotes, manifestos, product statements, onboarding messages, or editorial passages" plus "scroll", "word by word", and "reveal" give good keyword coverage a user would plausibly say. A few natural variations (e.g., "scroll-linked text animation", "typewriter effect") are missing — typing is only implied via "rather than simulate typing" — so it sits at anchor 4, not 5.

Distinctiveness Conflict Risk

The scroll-scrubbed word-reveal niche is distinct (explicitly contrasted with typing simulation), but requests like "animate my headline on scroll" could also match generic animation or scroll-trigger skills, giving minor overlap risk. This fits anchor 4 better than anchor 5's 'minimal conflict risk' and clearly better than anchor 3's broad overlap.