Conciseness

The Quick Reference and Check/Fix/Explain/Code Review sections are lean and information-dense, but the three-sentence intro ('Jarring instant page changes are one of the most noticeable perceived-performance problems... Previously, achieving this required complex JavaScript animation libraries...') is motivational background Claude already knows. Fits anchor 4 (efficient with minor over-explanation that could be trimmed) rather than 5.

Actionability

Concrete, named constructs throughout: 'Wrap DOM mutations in document.startViewTransition()', 'Add view-transition-name to elements', '@starting-style and ::view-transition-* pseudo-elements', '@view-transition { navigation: auto }'. Minor gap: no inline code example, with implementation deferred to references/rule.md, so it fits anchor 4 rather than fully copy-paste-ready anchor 5.

Workflow Clarity

A clear Check → Fix → Explain → Code Review sequence with concrete review criteria ('prefers-reduced-motion guards, duplicate view-transition-name values'). This is not a destructive or batch operation so no validation cap applies, but no explicit verify/test checkpoint exists and the Fix step's details live in the reference — anchor 4 (clear sequence, minor validation gaps).

Progressive Disclosure

The body is a concise overview and the single bundle file (references/rule.md, verified to exist with code examples and framework-specific guidance) is signaled one level deep: 'For full implementation details, code examples, and framework-specific guidance, see references/rule.md'. Matches anchor 5 (clear overview, well-signaled one-level-deep references, appropriate split).

Specificity

Lists several concrete scenarios ('adding page transition animations, image expand/contract effects, shared-element transitions'), though 'improving navigation UX' is generic and no implementation actions are stated. Matches anchor 4 (several specific items, minor gaps in coverage) rather than 5, which requires comprehensive concrete actions.

Completeness

Only a 'when' clause is present — the description never states what the skill does (e.g., that it implements transitions via the View Transitions API). The 'when' is explicit and concrete, placing it above the vague anchor-2 example ('Use when working with documents'), but the entirely missing 'what' keeps it below anchors 4-5.

Trigger Term Quality

Natural user phrases like 'page transition animations', 'shared-element transitions', 'image expand/contract', and 'single-page or multi-page application' give good keyword coverage. A few natural terms are missing (e.g., 'View Transitions', 'SPA', 'app-like transitions'), so it fits anchor 4 rather than the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

'Page transition animations', 'shared-element transitions', and 'image expand/contract effects' form a clear niche, but 'improving navigation UX' is broad enough to overlap with general navigation or UX-design skills. Fits anchor 4 (mostly distinct, minor overlap risk with closely related skills).