Conciseness

The body is lean (~40 lines), well-sectioned, and does not re-explain concepts Claude already knows; nearly every line carries instruction. It is not a 5 because the 'Explain' section directs Claude to do something it already knows how to do, and the 'Code Review' section repeats the rule title mid-sentence ('that affect Use correct definition list structure'), adding template noise.

Actionability

There is concrete guidance — 'Ensure <dl> contains only <dt>, <dd>, or <script>/<template> tags' names specific tags — but key details are missing or misleading: the Quick Reference says 'Avoid wrapping list items in invalid container elements like <div>' while references/rule.md and HTML5 explicitly allow div wrappers around dt/dd pairs, and the fix instruction 'wrap them appropriately to maintain semantic integrity' is vague with no inline good/bad markup example. This fits 'some concrete guidance but incomplete / missing key details' rather than 4.

Workflow Clarity

The Check → Fix → Explain → Code Review sequence is clearly ordered for a simple single-purpose skill, and verification is mentioned ('note how to verify the fix with browser accessibility tooling or assistive tech'). Not a 5 because the validation checkpoint is only implied in the body — actual verification steps are delegated to references/rule.md rather than stated inline.

Progressive Disclosure

The body is a concise overview with clear sections and a single, well-signaled, one-level-deep reference — 'For full implementation details, code examples, and framework-specific guidance, see references/rule.md' — and that file exists and matches its advertised purpose. For a short skill with one appropriate bundle file, structure and navigation are clean.

Specificity

The description lists several concrete actions — 'Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output' — naming specific review activities rather than vague capability claims. It falls short of a 5 because coverage has gaps (no mention of producing fixes/reports) and the actions are generic accessibility-review boilerplate rather than definition-list-specific.

Completeness

Both parts are explicitly present: 'what' via 'Check native semantics first, then inspect keyboard behavior...' and 'when' via the explicit 'Use when reviewing rendered HTML, interactive components, or design-system patterns' clause. It is not a 5 because the when-clause is broad and templated — it would fit nearly any accessibility rule — rather than a crisp, concrete trigger tied to definition lists.

Trigger Term Quality

Natural trigger terms are present: 'rendered HTML', 'interactive components', 'definition list structure', 'keyboard behavior', 'focus flow', 'accessible names', 'screen-reader output' — phrases a user raising this issue would plausibly say. Not a 5 because common synonyms and element names are missing ('dl', 'dt', 'dd', 'description list', 'a11y'), and the awkward embedded phrase 'related to Use correct definition list structure' is a rule title, not natural user phrasing.

Distinctiveness Conflict Risk

The only distinguishing element is the embedded rule title 'Use correct definition list structure'; the surrounding trigger ('reviewing rendered HTML, interactive components, or design-system patterns') is a shared template that would fire identically for any sibling accessibility rule in this family. This matches 'somewhat specific but could still overlap with similar skills' — not a 4, since the overlap with closely related accessibility skills is more than minor.