Conciseness

The body is lean and assumes competence — short bulleted sections with no padding or explanation of concepts Claude already knows. One instance of duplication keeps it at anchor 4 rather than 5: the intro's "shared articles gain traffic, which can attract backlinks" is repeated almost verbatim as the Quick Reference bullet "Share buttons do not directly affect Google ranking but drive traffic that can result in backlinks".

Actionability

The Fix section gives some concrete specifics ("Use `window.location.href` or the page's canonical URL as the shared link", "Include `og:title` and `og:image`") but the key executable detail is missing: "Add share links constructed with platform share URLs" names the mechanism without ever providing a single share URL format in the body. This is anchor 3 ('some concrete guidance but incomplete; missing key details') — not 4 because Claude cannot construct the share links from the body alone, and not 2 because the Check/Fix guidance goes beyond high-level hints.

Workflow Clarity

The Check → Fix → Explain → Code Review structure gives a clear, coherent sequence for this audit-style skill, and as a simple single-task skill it approaches the simple-skill exception. However, verification is only vaguely gestured at ("describe how to verify the final page output") rather than stated as explicit steps, matching anchor 4 ('clear sequence with most checkpoints present; minor validation gaps'). Not destructive or batch, so no cap applies; not 5 because the verification checkpoint is implicit.

Progressive Disclosure

The body is well under 50 lines, well-organized with clear section headers, and defers implementation detail via a single clearly signaled, one-level-deep pointer — "For full implementation details, code examples, and framework-specific guidance, see `references/rule.md`" — which exists on disk and contains exactly that (share URL code examples, platform table, verification steps). This matches anchor 5 and the under-50-line simple-skill pattern.

Specificity

The description names the domain ("blog posts, news articles, tutorials, and other long-form content") but lists no concrete actions; the only action-like phrase is the generic "optimizing content distribution", and it never states what the skill does (add social share buttons). This matches anchor 2 ('names the domain but actions are minimal or generic') rather than anchor 3, which requires 1-2 concrete named actions.

Completeness

Only the 'when' is present ("Use when applies to blog posts...", "Less relevant for product pages, service pages, or home pages", "Use when optimizing content distribution") with no statement of what the skill does — the exact anchor-2 case ('only when is present without what', cf. "Use when working with documents"). Not anchor 3 because there is no clear 'what' at all, and the opening clause is also ungrammatical ("Use when applies to") which further obscures intent.

Trigger Term Quality

Some natural keywords users would say are present ("blog posts", "news articles", "tutorials", "long-form content"), but the central trigger phrases for this task — "share buttons", "social sharing", "social media" — are entirely absent, matching anchor 3 ('some relevant keywords but missing common variations or synonyms'). Not anchor 4 because the most important synonyms for the actual capability are missing.

Distinctiveness Conflict Risk

The scoping to long-form content and the explicit exclusions ("Less relevant for product pages, service pages, or home pages") make it somewhat specific, but with no sharing-related vocabulary it would trigger for any content-SEO or content-distribution skill covering blog posts — matching anchor 3 ('somewhat specific but could still overlap with similar skills'). Not anchor 4 because the overlap risk with closely related content-optimization skills is more than minor.