Conciseness

The checklist style is mostly efficient and assumes Claude's competence, but there is notable slack: the ~70-line inline International SEO section duplicates material that has its own reference file, the E-E-A-T and engagement-signal enumerations restate knowledge Claude already has, and "Task-Specific Questions" repeats items already asked in "Initial Assessment" (Search Console access, recent changes, traffic baseline). This matches anchor 3 (mostly efficient but could be tightened) rather than 4, where only minor trimming would be needed.

Actionability

For an instruction-only audit skill the guidance is fully concrete: exact thresholds (LCP < 2.5s, INP < 200ms, CLS < 0.1; titles 50-60 chars; descriptions 150-160 chars), a copy-paste browser command (document.querySelectorAll('script[type="application/ld+json"]')), specific tools with URLs, per-site-type issue lists, and a field-level report template (Issue/Impact/Evidence/Fix/Priority). Specific examples cover the common audit cases.

Workflow Clarity

The sequence is clear and well-ordered: Initial Assessment questions, an explicit five-level Priority Order, per-area checklists, and a structured report ending in a Prioritized Action Plan, with real validation guards (the schema-detection limitation with alternatives, the prompt-injection warning, and the mandatory "Evidence: How you found it" field). It falls short of anchor 5 because there is no explicit verify/re-check loop and the duplicated question sections blur the entry workflow.

Progressive Disclosure

All seven referenced files exist, are linked inline at the point of use with descriptive annotations, and are summarized again in a References section — good, well-signaled structure. Minor gaps keep it below anchor 5: local-seo.md chains to two companion files (a second nesting level, though SKILL.md does signal them), and the long inline International SEO section sits alongside its own reference file rather than being fully split out.

Specificity

"audit, review, or diagnose SEO issues on their site" names the domain and a concrete action, but the three verbs are near-synonyms and the description never enumerates the audit's distinct capabilities (technical, on-page, content, authority). It matches anchor 3 (domain plus 1-2 concrete actions) rather than 4, which requires several specific listed actions.

Completeness

Both "what" (audit/review/diagnose SEO issues) and "when" are explicitly present, with maximally concrete trigger phrases including a catch-all for vague requests. It falls between anchors 4 and 5: the "when" exceeds anchor 4, but the "what" is a single thin clause that omits what the audit produces (prioritized findings and recommendations), keeping it below anchor 5's fully concrete what-plus-when.

Trigger Term Quality

Trigger coverage is comprehensive and natural: "SEO audit," "why am I not ranking," "my traffic dropped," "stuck on page 2," "striking distance keywords," "low CTR," "Google Business Profile," "map pack," and even vague fallbacks like "my SEO is bad." These are exactly the phrases users would say, including synonyms and variations.

Distinctiveness Conflict Risk

The description carves out a clear audit/diagnosis niche and explicitly routes adjacent work to sibling skills ("For building pages at scale to target keywords, see programmatic-seo. For adding structured data, see schema. For AI search optimization, see ai-seo."), so trigger terms are unlikely to fire the wrong skill.