Conciseness

Mostly efficient — short sections, one useful safe-pattern snippet — but the "default to no finding" guidance is repeated three times ("Do not automatically raise performance findings on decorative micro-assets", "Do not report decorative images as accessibility or performance failures", and the safe-pattern bullet), and the intro sentence plus the generic "Explain" section restate things Claude already knows. Not 4 because the duplication and generic explanation go beyond minor trimming; not 2 because the body is short and largely earns its tokens.

Actionability

Concrete, executable guidance for an instruction-only skill: exact attribute values ("alt='' (empty)", "aria-hidden='true'", "Role='presentation'"), a specific safe pattern (`<img src="/divider.svg" alt="" aria-hidden="true">`), and direct fix instructions ("Add alt='' to decorative img elements... Use CSS background-image for purely decorative visuals"). Not 5 because there is no before/after example of an actual violation, which the common cases would benefit from.

Workflow Clarity

The single-purpose review flow is legible: Quick Reference → Check → Fix → Explain → Code Review, with Check stating exactly what to verify ("Verify decorative images have empty alt attributes (alt=''), decorative icons use aria-hidden='true'"). Not 5 because the body omits any verification step (how to confirm the fix with browser accessibility tooling is mentioned only in passing, and the actual Verification section lives in the reference without being signposted); no destructive/batch operations, so no cap applies.

Progressive Disclosure

This is a simple skill under 50 lines with well-organized sections and a clearly signaled one-level-deep reference: "For full implementation details, code examples, and framework-specific guidance, see `references/rule.md`" — the file exists and its headers (Code Example, Decorative SVGs and Icons, Verification, etc.) match the promised content. Content split is appropriate and navigation is easy.

Specificity

The description lists several concrete review actions — "Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output" and "default to no finding unless the snippet shows an actual issue" — with only minor coverage gaps (e.g., no mention of alt-attribute or ARIA-specific checks). Not 5 because it stops short of a comprehensive action list; not 3 because it clearly exceeds 1-2 concrete actions.

Completeness

Both are present: the "what" is the concrete review process ("Check native semantics first, then inspect keyboard behavior...") and the "when" is explicit ("Use when reviewing rendered HTML, interactive components, or design-system patterns related to Hide decorative elements"). Not 5 because the "when" clause is scoped to the rule name rather than concrete user-observable trigger phrases (e.g., "when the user mentions alt text, decorative images, or screen-reader noise").

Trigger Term Quality

Relevant keywords are present ("rendered HTML", "interactive components", "design-system patterns", "assistive technology", "screen-reader output", "focus") but common natural variations are missing: users would likely say "alt text", "accessibility", "a11y", "screen reader", "SVG icons", or "icon fonts". Not 4 because the missing synonyms are among the most likely user phrasings for this topic; not 2 since more than a couple of relevant terms are present.

Distinctiveness Conflict Risk

The decorative-elements/assistive-technology niche is fairly distinct, and the guidance about defaulting to no finding differentiates it from general linting skills. Not 5 because the broad opener "reviewing rendered HTML, interactive components, or design-system patterns" overlaps with other accessibility-review skills before the rule-specific qualifier narrows it.