Conciseness

The body is short and tightly sectioned, but contains one concept explanation Claude already knows ("Demonstrating the expertise of the content creator is a core component of E-E-A-T…") and a trailing "Rule page:" URL that duplicates the frontmatter. These are minor trimmable tokens, matching the anchor at 4 rather than the every-token-earns-its-place anchor at 5.

Actionability

Concrete, executable guidance throughout: "Include a short bio for each author", "Link to the author's social profiles or professional websites (e.g., LinkedIn)", "Mention specific certifications", "Flag exact routes or templates where search-facing output violates the rule", with a complete executable HTML example in the referenced bundle file. Not 5 because the body lacks a concrete verification command (e.g., how to fetch rendered HTML) — that detail is deferred to the reference.

Workflow Clarity

A clear Check → Fix → Explain → Code Review sequence with verification explicitly named ("describe how to verify the final page output") and detailed automated/manual verification steps one level deep in references/rule.md. Not 5 because the phases are section headers rather than ordered steps with an inline validation checkpoint before flagging a violation.

Progressive Disclosure

A short, well-organized overview body with a clearly signaled one-level-deep pointer — "see `references/rule.md`" — that resolves to a real file appropriately holding the code example, standards, and verification detail. Content is correctly split with easy navigation, matching the top anchor.

Specificity

Names two concrete actions — "auditing metadata, crawlability, structured data, or indexability" and "Verify the rendered HTML and HTTP response" — with four specific audit surfaces, matching the 'several specific actions with minor gaps' anchor. Not 5 because remediation actions (adding bios, linking profiles, structured-data types) are absent; not 3 because the enumerated audit objects go beyond 1–2 generic actions.

Completeness

Has both an explicit "Use when auditing…" trigger clause and a concrete "what" ("Verify the rendered HTML and HTTP response rather than relying only on source files"). Not 5 because the "what" states methodology but not the full capability set; not 3 because the "when" is explicit with concrete trigger phrases, not weakly implied.

Trigger Term Quality

Good natural keyword coverage: "metadata", "crawlability", "structured data", "indexability", "author credentials", "expertise", "rendered HTML", "HTTP response". Missing common synonyms users would say such as "author bio", "E-E-A-T", or "rich results", so it falls short of the comprehensive-synonyms anchor at 5.

Distinctiveness Conflict Risk

The topic clause "related to Highlight author credentials and expertise" carves a clear niche with minimal conflict risk, but the generic audit lead-in ("metadata, crawlability, structured data, or indexability") is shared boilerplate across SEO-audit skills, giving minor overlap with closely related sibling skills.