Conciseness

The ~33-line body is lean: a Quick Reference of four one-line hint mappings, short Check/Fix sections, and a pointer to the reference file, with no tutorial padding about what resource hints are. Not a 5 because sections like "Explain the differences between preload, prefetch, preconnect, and dns-prefetch" restate knowledge Claude already has and the "Check" line duplicates the title's instruction.

Actionability

The Quick Reference gives concrete mappings ("Use preload for critical above-the-fold resources (fonts, hero images)", "Use preconnect for third-party origins") but the body contains no executable code or syntax — e.g. "Add appropriate resource hints (preload, prefetch, preconnect) for critical assets" is a high-level instruction, with the actual HTML examples deferred entirely to references/rule.md. This sits between anchors 2 and 4: useful concrete guidance, but incomplete on its own.

Workflow Clarity

A rough sequence exists via the Check → Fix → Explain → Code Review sections, and the Code Review section asks to "describe the measurement method used to confirm the issue". But validation checkpoints are implicit: there is no verify-after-fix step (e.g. re-measure LCP or confirm hints render in the Network panel), matching anchor 3 rather than 4.

Progressive Disclosure

The body is a concise overview that defers full implementation details, code examples, and framework guidance to a single clearly signaled one-level-deep reference ("see `references/rule.md`"), and that file exists and contains the promised code examples. This matches the anchor for a clear overview with well-signaled, appropriately split content.

Specificity

The description names the domain ("resource hints", "slow page loads") and one concrete action ("Verify the actual bottleneck in DevTools, Lighthouse, or field data"), but the core capability is only implied via the pasted title "Use resource hints for faster loading" rather than listed as specific actions. It does not reach anchor 4 because it never states several concrete actions like adding preload/preconnect/prefetch hints.

Completeness

Both elements are present: an explicit when-clause ("Use when auditing slow page loads, heavy assets, or rendering delays") and a what ("Use resource hints for faster loading... Verify the actual bottleneck... before recommending changes"). Not a 5 because the 'what' is a garbled title splice ("delays related to Use resource hints for faster loading") rather than clearly enumerated capabilities.

Trigger Term Quality

Natural trigger phrases like "auditing slow page loads", "heavy assets", "rendering delays", and tool names ("DevTools", "Lighthouse") are present and would be said by users. Not a 5 because common synonyms such as "page speed", "Core Web Vitals", "LCP", or hint names like "preload"/"preconnect" are missing.

Distinctiveness Conflict Risk

The niche (resource hints for page-load performance) is somewhat specific, but the leading triggers "slow page loads", "heavy assets", and "rendering delays" are generic web-performance terms that would equally fire sibling performance skills (image optimization, lazy loading, bundling). Not a 4 because only the embedded title distinguishes it, not the trigger phrases themselves.