Conciseness

The body is short, but 'Check' and 'Code Review' largely duplicate each other (both: 'Find/Check JSON-LD blocks with @type Product', 'verify required fields', 'price matches visible page', 'Validate with Google's Rich Results Test'), and 'Explain' repeats the intro's rich-result/CTR claim. This fits anchor 3 ('Mostly efficient but includes some unnecessary explanation or could be tightened') rather than 2, since the padding is duplicated sections, not explanation of concepts Claude doesn't know.

Actionability

The guidance is concrete and executable without code: exact required fields with format constraints ('offers.price (numeric)', 'ISO 4217 code', 'schema.org URL', 'absolute URL array'), a named validation tool ('Google's Rich Results Test'), and a price-match invariant. It fits anchor 4 ('Mostly executable guidance... minor gaps') rather than 5 because the body itself contains no copy-paste JSON-LD example — the example lives only in references/rule.md, which per the rubric's scoring notes is not penalized further for an instruction-oriented skill.

Workflow Clarity

The Check → Fix → Code Review structure forms a clear single-purpose sequence with explicit checkpoints ('Check that prices in schema match the visible page prices', 'Validate with Google's Rich Results Test', 'reviewCount > 0 if rating is present'), fitting anchor 4. It is not 5 because there is no error-recovery loop (what to do when the Rich Results Test fails is only implied by the Fix section), and the validation steps are spread across three near-duplicate sections instead of one ordered checklist.

Progressive Disclosure

The body is a lean overview under 50 lines, well-sectioned (Quick Reference, Check, Fix, Explain, Code Review), with a clearly signaled one-level-deep pointer that matches the real bundle: 'For full implementation details, code examples, and framework-specific guidance, see references/rule.md' (file exists; no nested references inside it). This matches anchor 5 ('Clear overview with well-signaled one-level-deep references; content appropriately split').

Specificity

The description names the domain ("e-commerce product pages", "structured data for a shop") and two actions ("auditing", "implementing structured data"), matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'. It stops short of anchor 4 because it never lists several specific actions (no mention of JSON-LD, Product schema, rich result validation, or price-matching checks).

Completeness

The 'when' is explicit and repeated ("Use when auditing e-commerce product pages or implementing structured data for a shop. Applies to any page selling or describing a specific product."), and a 'what' is present (audit/implement structured data on product pages). It fits anchor 4 rather than 5 because the 'what' could be more concrete — it never says the skill adds or validates Product schema/JSON-LD markup.

Trigger Term Quality

Natural phrases like "e-commerce product pages", "structured data", "shop", and "any page selling or describing a specific product" give good keyword coverage, fitting anchor 4 ('Good keyword coverage; a few natural terms missing'). It is not anchor 5 because common variations users would say — "Product schema", "JSON-LD", "rich results/rich snippets" — are absent.

Distinctiveness Conflict Risk

The niche (product-page structured data) is mostly distinct with clear product/shop triggers, matching anchor 4 ('Mostly distinct; minor overlap risk with closely related skills'). It is not anchor 5 because sibling SEO structured-data skills (e.g., a generic JSON-LD or schema-markup rule) could plausibly trigger on the same phrasing.