Conciseness

The body is short but noticeably redundant: the blocked-name list appears twice ('Common blocked names: .ad, .ads, .advertisement, .banner...' in Quick Reference and again '.ad, .ads, .advertisement, .banner, .sponsor, #ad, #banner...' in Check), and the rename advice is repeated in Quick Reference ('Rename affected elements using semantic, content-specific class names') and Fix. The opening paragraph also duplicates rule.md's 'Why It Matters' verbatim. This fits anchor 3 (mostly efficient but could be tightened) rather than 4, where duplication would be only a minor trim.

Actionability

There is concrete material — a specific pattern list ('.ad, .ads, .advertisement, .banner, .sponsor, #ad, #banner, .cookie-notice, .consent') and copy-ready replacement names ('.privacy-controls or .cookie-preferences instead of .cookie-banner or .gdpr-notice') — but the core Check action is underspecified: 'Test the page with uBlock Origin enabled in a browser to identify elements that are hidden' gives no method for detecting hidden elements (devtools inspection, uBlock's logger, a selector audit) and no before/after code example lives in SKILL.md. This is anchor 3 (some concrete guidance but incomplete, missing key details) rather than 4, where the gaps would be minor.

Workflow Clarity

The Check → Fix → Explain sequence is present and readable, but validation is only implicit: 'Test your site with uBlock Origin enabled' appears once up front, with no checkpoint to re-test after renaming or verify the rename didn't break existing CSS/JS selectors. This matches anchor 3 (sequence present but checkpoints missing or implicit) rather than 4, which requires most checkpoints present. The skill is non-destructive, so no lower cap applies.

Progressive Disclosure

The body is a compact overview with a clearly signaled, one-level-deep, verified reference: 'For full implementation details, code examples, and framework-specific guidance, see references/rule.md' (the file exists, 158 lines). This fits anchor 4 (good structure, references mostly clear, minor gaps) rather than 5 because content duplicated between SKILL.md and rule.md — the identical opening paragraph and the pattern lists — sits inline where the overview could simply point to the reference.

Specificity

The description names the domain precisely ('layout and functionality issues caused by adblocker filter rules targeting common ad-related class names and IDs') but lists only a single action verb ('reviewing'). It matches anchor 3 (domain plus 1-2 concrete actions, not comprehensive) — not 4 because it never states what the skill does about found issues (e.g., identify, rename, fix), and not 2 because the domain is far more specific than 'Processes PDF files'.

Completeness

It has an explicit, specific 'when' clause ('Use when reviewing a website for layout and functionality issues caused by adblocker filter rules...') and the 'what' is derivable from that same clause (reviewing for adblocker-caused hiding of class names/IDs). It fits anchor 4 (both present, one could be more explicit) rather than 5 because the 'what' is merged into the 'when' clause — there is no standalone statement of the skill's concrete actions — and rather than 3 because the 'when' is explicit, not merely implied.

Trigger Term Quality

Natural terms a user would say are present: 'reviewing a website', 'layout and functionality issues', 'adblocker', 'filter rules', 'class names and IDs'. This is good coverage of the niche's phrase space (anchor 4), falling short of anchor 5 because common synonyms and tool names are missing — no 'ad blocker' (spaced variant), 'uBlock', 'EasyList', 'hidden elements', or 'cookie banner not showing'.

Distinctiveness Conflict Risk

'Adblocker filter rules targeting common ad-related class names and IDs' carves out a clear niche with distinct triggers (adblockers, filter rules, class names/IDs) that virtually no other skill would claim. This matches anchor 5 — clear niche, distinct triggers, minimal conflict risk; not 4 because there is no meaningful overlap with a neighboring skill's territory.