Conciseness

The body is short but visibly redundant: the same detection instruction appears three times ('Validate with HTML validator or inspect parsed DOM to confirm placement', the 'Check' section's 'check whether any <meta> elements appear outside <head>', and the 'Code Review' section's 'traverse up the parent chain'), and the 'Explain' section restates the HTML-spec rule that meta tags belong in <head> — a concept Claude already knows. It matches 'mostly efficient but includes some unnecessary explanation or could be tightened'; score 2 would require several padded sections, which is not the case.

Actionability

Guidance is concrete and executable in instruction form: 'Parse the HTML and check whether any <meta> elements appear outside <head>... Flag each misplaced tag by name/property', 'refactor the injection to target document.head instead of document.body', and a specific watch-list ('meta name=robots, meta name=description, meta property=og:*, link rel=canonical'). Per the scoring notes, absence of code in an instruction-only skill is not penalized when guidance is actionable — and the executable code lives in the referenced rule.md — but the body itself carries minor gaps (no runnable detection command inline), fitting the score-4 anchor.

Workflow Clarity

This is a simple, single-purpose audit skill, so the simple-skill exception applies: Check → Fix is unambiguous, and a verification checkpoint exists ('Validate with HTML validator or inspect parsed DOM to confirm placement'). It falls just short of 5 because the sequence is presented as parallel sections rather than an ordered flow, and 'Check' and 'Code Review' duplicate each other without indicating which governs, leaving a minor gap; it clearly exceeds score 3, which requires missing checkpoints.

Progressive Disclosure

The body is a well-organized overview (Quick Reference, Check, Fix, Explain, Code Review) that defers all implementation details, code examples, and framework-specific guidance via a clearly signaled one-level-deep pointer — 'see `references/rule.md`' — and that file exists and contains exactly the promised material (code examples, framework notes, detection commands). This matches the score-5 anchor: clear overview, well-signaled one-level-deep reference, content appropriately split, easy navigation.

Specificity

The description names the domain precisely ('meta tags (noindex, canonical-url, description, viewport, OG tags) may have been injected into the body by CMS plugins, widgets, or JavaScript rendering') but offers only one action verb — 'auditing HTML document structure' — with no enumeration of concrete actions (detect, flag, relocate, refactor injection). It names domain plus 1-2 concrete actions without comprehensive coverage, matching the score-3 anchor; score 4 would require several distinct specific actions.

Completeness

Both parts are present: an explicit 'when' ('Use when auditing HTML document structure. Applies to any page where meta tags... may have been injected into the body') and a 'what' ('auditing'). However the 'what' is generic — it never states the skill detects and fixes misplaced meta tags — so it matches 'has both what and when; when could be more explicit or specific' inverted (when is specific, what is vague), not the fully concrete score-5 anchor.

Trigger Term Quality

Strong natural terms users would say: 'meta tags', 'noindex', 'canonical-url', 'viewport', 'OG tags', 'CMS plugins', 'JavaScript rendering', 'HTML document structure'. Missing a few common variations like 'SEO', 'head', 'search engines', or 'Googlebot', so it fits 'good keyword coverage; a few natural terms missing' rather than the comprehensive score-5 anchor.

Distinctiveness Conflict Risk

The trigger is anchored to a niche (meta tags injected into body by CMS plugins/widgets/JS rendering) with distinctive terms like 'noindex' and 'OG tags', making it mostly distinct with only minor overlap risk against sibling SEO-audit skills from the same frontendchecklist rule family. Not score 5, since 'auditing HTML document structure' is broad enough to compete with general HTML-audit skills.