Conciseness

The body is telegraphic, checklist-style bullets with zero padding and no explanation of concepts Claude already knows — every line encodes repo-specific detection heuristics ("`border` + `box-shadow` on the same lifted surface", "durations > 300ms on UI controls", "compare document scrollWidth to measured clientWidth"). This clearly matches the lean/efficient anchor; not 4, as there are no over-explanations to trim.

Actionability

For an instruction-only skill the guidance is fully executable: exact paths to grep (`apps/app/src/components/ui/`), exact code patterns (`text-gray-400`, `#000`, `outline: none`, `CardDescription` under `CardTitle`), concrete thresholds (320px viewport, 305px usable, >300ms), an explicit severity mapping (medium/low, never high), and a defined report format. It is not 4 — there are no minor gaps in the concrete guidance.

Workflow Clarity

The sequence is discernible and stated where it matters ("Read `DESIGN.md` at the repository root first", then scope changed lines, check the category checklists, then report per the format section) with inline checkpoints ("Grep ... before reporting", scope exclusions, zero-findings-is-valid). It is not 5 because the workflow is never laid out as an explicit ordered sequence with validation checkpoints, leaving the overall flow implicit.

Progressive Disclosure

No bundle files exist, and the single file is well-sectioned (What to check / Do NOT report / Report format) with its one external reference (DESIGN.md) clearly signaled as the source of truth. It is not 5 because the ~123-line rule catalog is entirely inlined with no split of any kind, and not 3 because the structure and navigation are genuinely good.

Specificity

"Warn when user-facing UI changes drift from DESIGN.md" names the domain and one concrete action (warn on drift), but "Advisory only; findings never gate Warden clearance" is a constraint rather than a capability, so coverage of what the skill actually does (cite rule ids, report medium/low findings) is not comprehensive. This matches anchor 3 rather than 4, which requires several specific actions listed.

Completeness

The "what" is clear (warn when UI changes drift from DESIGN.md, advisory only), but there is no "Use when..." clause or equivalent explicit trigger guidance, capping completeness at 3 per the rubric guideline. It is not 2 because the "what" is concrete and the review context is weakly implied by "UI changes".

Trigger Term Quality

Relevant keywords like "user-facing UI", "DESIGN.md", and "drift" are present, but common natural variations users would say ("design review", "design spec", "check UI against the design system", "UI consistency") are missing. This sits at anchor 3 — some relevant keywords but missing common variations — and not 4, which requires good keyword coverage.

Distinctiveness Conflict Risk

References to "DESIGN.md" and "Warden clearance" pin the skill to a specific repo workflow, making it mostly distinct with only minor overlap risk against a generic design-review or code-review skill. Not 5, because "warn when user-facing UI changes drift" could still collide with a general design-review skill in the same ecosystem.