Conciseness

The body is short and sectioned, but the core attribute list (button triggers, aria-expanded, aria-controls, keyboard/arrow support) is restated nearly verbatim across Quick Reference, Check, Fix, and Code Review — e.g., 'Verify accordions use button triggers with aria-expanded, aria-controls, and proper keyboard navigation' versus 'Implement accordions with button elements, aria-expanded state, aria-controls linking to content panels, and keyboard support'. This systematic repetition goes beyond the 'minor instances' of the score-4 anchor, though nothing is padded with background Claude already knows.

Actionability

Guidance is concrete and specific: exact elements ('button elements for accordion triggers'), exact attributes ('aria-expanded', 'aria-controls'), exact keys ('Enter, Space, arrows'), and a directive to 'Flag exact elements, attributes, and routes'. No executable code appears in the body itself, but for an instruction-oriented review skill the rubric notes that absence of code is not penalized when guidance is actionable, and a complete HTML example sits one reference away — leaving only a minor gap versus fully copy-paste-ready material.

Workflow Clarity

Check, Fix, Explain, and Code Review give clear, unambiguous per-mode guidance for this non-destructive review task, each stating what to verify and what to produce. It falls short of 5 because the modes are presented as parallel unsequenced sections with no explicit ordering or validation checkpoint (e.g., confirm the rendered DOM matches the source template) connecting them.

Progressive Disclosure

The body is a lean overview (under 50 lines) with clearly signaled, one-level-deep references: 'For full implementation details, code examples, and framework-specific guidance, see references/rule.md'. The referenced file exists in the bundle and contains the detailed code example, so content is appropriately split with easy navigation — a direct match to the score-5 anchor.

Specificity

The description names the domain ('Make accordions keyboard navigable', 'templates, rendered HTML, or shared components') and 1-2 concrete actions ('Validate the final browser-facing markup'), but does not enumerate several specific capabilities as the 4-5 anchors require. It is more concrete than the score-2 anchor ('names domain but actions minimal'), since two concrete actions are stated.

Completeness

Both parts are present: an explicit 'Use when…' clause with concrete trigger targets (reviewing templates, rendered HTML, shared components) and a clear what ('Validate the final browser-facing markup, not just the source framework abstraction'). It does not reach 5 because the 'what' states only a single validation action rather than comprehensively describing what the skill does (check, fix, explain, review), and the phrasing 'related to Make accordions keyboard navigable' reads as an awkward rule-name reference rather than a fully explicit capability statement.

Trigger Term Quality

Natural terms users would say are present: 'templates', 'rendered HTML', 'shared components', 'accordions', 'keyboard navigable', 'markup'. A few common synonyms are missing — notably 'accessibility', 'a11y', 'screen reader', and 'ARIA' — so it falls short of the comprehensive coverage of the score-5 anchor but is clearly above 'some relevant keywords' (3).

Distinctiveness Conflict Risk

The niche trigger ('accordions keyboard navigable' in rendered HTML) gives a clear specialty with distinct triggers. Minor overlap risk remains with closely related sibling skills (other HTML accessibility review rules) that would share the generic 'templates, rendered HTML, or shared components' trigger phrases, placing it just below the minimal-conflict score-5 anchor.