Conciseness

The body is lean with no explanations of concepts Claude already knows — even the opening failure examples ("a button wired to `() => {}`", "an empty state that says 'Lorem ipsum'") and the note that contrast "is composited through translucent layers and `opacity`" convey non-obvious, skill-specific information. Every section earns its tokens, matching the 5 anchor.

Actionability

The workflow block gives copy-paste-ready commands with flags and output files (e.g. `python scripts/finish_lint.py src/ --output json > lint.json`), the exit-code table documents every script's outcomes, and a concrete no-Playwright fallback is provided ("Paste `assets/collect_snapshot.js` into the DevTools console"). The claimed `--help`/`--sample`/`--output` flags were verified to exist in all three scripts, so guidance is fully executable.

Workflow Clarity

The three-step sequence is clearly ordered with explicit per-step blocking conditions and documented validation via exit codes ("0 clean · 2 findings · 3 bad input · 4 blocked"), which is stronger than the 4 anchor's bare "verify output is valid". However, the error-recovery loop — fix findings and re-run until a script exits 0 — is implied by the exit codes rather than stated, so it falls just short of the 5 anchor's explicit "if errors: fix and re-validate" feedback loop.

Progressive Disclosure

The body is a pure overview: workflow, hard rules, a script table, and a references section where all detail (WCAG 2.2 criteria, per-kind state requirements, template traits) lives in one-level-deep files. Every referenced path was verified to exist in references/, scripts/ and assets/, and the reference files contain no nested references, so navigation is clean and matches the 5 anchor.

Specificity

The description lists nine distinct concrete capabilities — "finds controls that do nothing, placeholder copy, removed focus rings, missing loading/empty/error states, low contrast, small targets, hidden focus and broken reflow measured in the real browser, and flags template defaults" — which is comprehensive coverage of the rendered-UI QA domain. It exceeds the 4 anchor because there are no minor gaps in the action inventory.

Completeness

It explicitly answers both questions: "Use when a UI screen, page or component is about to be called done, handed off or shipped, or when generated UI looks generic or half-finished" is a concrete when-clause, and "Gates the rendered result... finds [specific defects]" is a clear what. The when-clause is already explicit and specific, so the 4 anchor's qualifier does not apply.

Trigger Term Quality

Natural trigger phrases like "about to be called done, handed off or shipped" and "generated UI looks generic or half-finished" match what a user would actually say. It falls short of the 5 anchor because common variations such as "design review", "UI polish" or "before/after screenshot" are absent, though the existing terms are more specific than the generic keywords of the 3 anchor.

Distinctiveness Conflict Risk

"Gates the rendered result, not the design file" carves out a clear niche distinct from source-level accessibility scans or design-generation skills, and the pre-handoff trigger conditions are unlikely to fire for the wrong skill. Conflict risk is minimal, matching the 5 anchor rather than the minor-overlap 4 anchor.