Conciseness

Overall efficient, instruction-style prose with concrete thresholds (44 px tap targets, 4.5:1 contrast, 1200x630 og:image) and no concept tutorials. A few rationale paragraphs restate what Claude already knows — 'Most first sites fail in the same places: a pretty page with no working way to order or book...' and 'A business site gets shared on cards, menus, QR codes, Google Maps and Instagram bios, so the address matters on day one' — and could be trimmed. This is minor over-explanation fitting anchor 4, not the lean every-token-earns-its-place level of 5.

Actionability

For an instruction-only skill the guidance is fully concrete: per-vertical build specs (e.g., 'phone as a tel: link', 'hours in a form people can scan in one second', 'A payment counts as done only after a configured payment system confirms it'), exact copy-paste-ready API calls with expected responses ('GET https://www.adddomain.net/api/check?name=<label>&src=github returns available, registered or unknown'), explicit fallback labels, and a final reporting checklist. Specific examples cover the common cases, matching anchor 5.

Workflow Clarity

The eight numbered sections form a clear brief → plan → build → craft → SEO → address → done-checks → handover sequence with explicit validation checkpoints: section 7's separately-reported checklist, 'Check the address and HTTPS before saying it works. A record seen in DNS is not yet a live site', and 'If a response is invalid, mark the check incomplete and let the owner verify it'. Decision points are stated ('start building while the owner reads it, unless an answer would change the structure'). This matches anchor 5's explicit validation and checklists.

Progressive Disclosure

There are no bundle files at all; the body is a single well-organized file with clear numbered sections and one clearly-signaled external example ('A complete optional example is at https://www.adddomain.net/guide/static-website-enquiry-form; the workflow here remains usable without that example'). At ~100 lines it exceeds the under-50-line simple-skill exception, and inlined detail (notably the section 6 domain API specifics) could live in a reference file — good structure with minor organization gaps, fitting anchor 4 rather than 5.

Specificity

The description lists many concrete capabilities — 'Design and build a responsive frontend website or accessible landing page', 'HTML and CSS layout in the existing stack, visual typography and accessibility checks, menus, shops, bookings, portfolios, customer forms, public web app interfaces, SEO and share previews, public launch and owner handover' — giving comprehensive, not minor-gap, coverage. It clearly exceeds the anchor 4 example, which anticipates gaps.

Completeness

It explicitly answers both questions: 'what' via the capability list and 'when' via the explicit 'Use for requests to build a website, make a business site or landing page, or complement a visual design skill' clause with concrete trigger phrases. This matches the anchor 5 example structure exactly; the 'when' is explicit, not the weaker form scored at 4.

Trigger Term Quality

'Use for requests to build a website, make a business site or landing page' captures natural user phrasing, with synonyms (website, business site, landing page) and vertical keywords (menus, shops, bookings, portfolios, enquiry, order). Coverage is comprehensive for this domain with no natural terms meaningfully missing, fitting anchor 5 rather than 4.

Distinctiveness Conflict Risk

The niche (public small-business/creator sites) is mostly distinct and it explicitly positions itself against visual design skills ('complement a visual design skill'), but 'public web app interfaces' broadens it toward overlap with general web-development skills. Minor overlap with closely related skills fits anchor 4; it is clearly more distinct than the anchor 3 examples.