Conciseness

The body is lean (~35 lines) with short, purposeful sections and no padding. Minor trimmable instances remain: the opening sentence explains a concept Claude already knows ("screen reader users will only hear the role (e.g., 'button') without knowing what it does"), and the Quick Reference bullet "Accessible names can be provided via text content, aria-label, or aria-labelledby" duplicates the Fix section almost verbatim. Not a 5 because of these two over-explanations.

Actionability

Concrete guidance exists — the Fix names specific mechanisms ("inner text, aria-label, or aria-labelledby") and Check/Fix/Explain/Code Review give a usable shape — but key executable details are deferred rather than included: the Check section says to find elements that "lack a clear accessible name" without saying how to inspect the rendered result (the accessibility tree, axe, or similar are only in references/rule.md), and no markup example appears in the body. This matches "some concrete guidance but incomplete; missing key details."

Workflow Clarity

The Check → Fix → Explain → Code Review sections form a clear, coherent sequence for a single-purpose review skill, and the Code Review section does mention verification ("note how to verify the fix with browser accessibility tooling or assistive tech"). It is not a 5 because validation checkpoints are only loosely implied — no explicit verify step (e.g., "confirm the accessible name appears in the accessibility tree before considering the fix done") closes the loop.

Progressive Disclosure

The body is a concise, well-sectioned overview that defers "full implementation details, code examples, and framework-specific guidance" to a single clearly signaled reference, references/rule.md, which actually exists and contains exactly that (code examples, why-it-matters, exceptions, standards, verification steps). The reference is one level deep with no further nesting, matching the anchor for a clear overview with well-signaled one-level-deep references.

Specificity

The description lists several concrete review actions — "Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output" — which are specific rather than vague. It falls short of a 5 because the core capability is only conveyed through the awkwardly embedded rule name ("related to Provide accessible names for ARIA command elements") rather than a cleanly stated skill-specific action, leaving minor gaps in coverage.

Completeness

Both parts are present: the "what" is the review procedure ("Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output") and the "when" is explicit ("Use when reviewing rendered HTML, interactive components, or design-system patterns..."). It is not a 5 because the "when" clause is circular — it restates the rule name instead of giving concrete user-side trigger phrases (e.g., mentions of unlabeled buttons, icon-only buttons, or screen-reader confusion).

Trigger Term Quality

Relevant keywords are present ("rendered HTML", "interactive components", "ARIA", "accessible names", "screen-reader"), but common natural variations users would actually say are missing — notably "button", "link", "icon button", "a11y", and "aria-label". A user complaining about an unlabeled button would not naturally phrase their need as "design-system patterns related to Provide accessible names for ARIA command elements".

Distinctiveness Conflict Risk

The named rule ("Provide accessible names for ARIA command elements") is a distinct niche, but the trigger preamble ("Use when reviewing rendered HTML, interactive components, or design-system patterns related to...") is a generic template that would be shared verbatim by sibling accessibility-rule skills, creating real overlap risk. It is somewhat specific but could still collide with closely related skills, matching the anchor for 3.