Conciseness

The body is lean with well-scoped sections and no explanation of concepts Claude already knows. Minor trimming is possible: the Quick Reference bullets ("Serve `llms.txt` at the root…", "Keep crawl and indexing controls in `robots.txt`") largely restate points already made in Check and Fix, which keeps it below anchor 5.

Actionability

Guidance names concrete goals ("Confirm that linked URLs return HTTP 200", "Add `llms.txt` at the site root with a short description of the project") but omits the how: no fetch/status-check command is given, and the llms.txt file format exists only in references/rule.md rather than as an inline example. Anchor 3 fits — concrete but incomplete with key execution details deferred; not anchor 4 since nothing in the body itself is directly executable.

Workflow Clarity

The Check → Fix → Explain → Code Review structure gives a clear sequence, and the Check section embeds verification criteria (HTTP 200 on linked URLs, llms.txt not replacing robots.txt/sitemaps), satisfying most checkpoints. It falls short of anchor 5 because there is no re-verify step after Fix and no explicit ordered step list, leaving a minor validation gap.

Progressive Disclosure

The body is a short, well-organized overview (Quick Reference, Check, Fix, Explain, Code Review) that defers all implementation detail to a single, clearly signaled, one-level-deep reference: "For full implementation details, code examples, and framework-specific guidance, see `references/rule.md`" — a real file in the bundle. This matches the anchor-5 pattern of a clean overview with well-signaled shallow references.

Specificity

The description lists several concrete actions — "Check the final file served at `/llms.txt`", "verify that the linked pages are stable, high-value, and accessible without relying on a JavaScript-only interface" — going beyond the 1-2 actions of anchor 3. It falls short of anchor 5 only because coverage isn't comprehensive (no fix or reporting actions named).

Completeness

Both questions are answered explicitly: the what ("Check the final file served at `/llms.txt` and verify that the linked pages are stable, high-value, and accessible") and the when ("Use when auditing public documentation portals, API references, help centers, SDK docs, or large knowledge bases") with concrete trigger contexts. This matches the anchor-5 pattern exactly.

Trigger Term Quality

Natural triggers like "documentation portals, API references, help centers, SDK docs, large knowledge bases" plus the distinctive `llms.txt` term give good keyword coverage a user would actually say. A few natural variants (e.g., "developer docs", "docs site", "llms-full.txt") are missing, keeping it below anchor 5.

Distinctiveness Conflict Risk

The `llms.txt` check is a clear niche with distinct triggers, but the broad opening phrase "auditing public documentation portals" creates minor overlap risk with general documentation/SEO audit skills. It is mostly distinct rather than minimally-conflicting (anchor 5) because the domain terms alone don't disambiguate before the llms.txt specifics appear.