Conciseness

Most of the body is dense, proprietary content Claude does not already know (token ramps, elevation tiers, the phrasebook), but the "lead with the feeling, not the fix" rule is restated in four or more places (three-layers intro, values intro, moves intro, and the feedback section), and the "Why these four?" / tensions discussion is editorial persuasion rather than operational instruction. This fits anchor 3 ("mostly efficient but includes some unnecessary explanation or could be tightened") better than anchor 4, where over-explanation would be only minor.

Actionability

For an instruction-only skill the guidance is fully actionable: concrete decision rules with values ("500 is off the ramp — snap to `semiBold` (600)", "codicons are 16 or 12 only", the spacing ramp steps), named CSS tokens in tables, a don't-say/do-say phrasebook, and four worked examples covering common cases. The guidance is copy-paste ready for its task, matching anchor 5.

Workflow Clarity

The core process is unambiguous and sequenced: "name the feeling, find the principle it breaks, then reach for the move", reinforced by a numbered 5-step feedback order (feeling → surface → principle → move → number) and worked examples that demonstrate each step. No validation checkpoints are needed for this non-destructive judgment task, so the simple-skill exception applies and the single workflow is unambiguous.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), yet the entire vocabulary — values, principles, moves tables, phrasebook, and feedback protocol — is inlined in a single ~330-line SKILL.md whose own text says to "read top-down when learning", material that would work well as separate reference files. Its external references (`baseSizes.ts`, `design-tokens.instructions.md`, `coding-guidelines.instructions.md`) point to paths outside the skill that are not bundled and cannot be verified. This fits anchor 3 ("content that should be separate is inline") rather than anchor 4 despite good internal anchor-based navigation.

Specificity

The description enumerates multiple concrete actions — "reasoning about UI in design terms", "deciding a radius, spacing, type role, icon size, border, color, or motion", and "translating a 'this feels off' observation into a concrete, principled fix" — covering the domain comprehensively. No material gaps exist, so it matches the anchor 5 example's breadth rather than the 'minor gaps' of anchor 4.

Completeness

It explicitly answers both questions: the what is "a shared Values→Principles→Moves vocabulary for reasoning about UI in design terms instead of raw pixels", and the when is an explicit "Use when..." clause with three concrete trigger conditions. This mirrors the anchor 5 example structure exactly.

Trigger Term Quality

Natural trigger phrases a user would actually say are comprehensively covered: "designing, building, reviewing, or giving feedback on any visual surface", the concrete decision nouns (radius, spacing, icon size, color, motion), and the especially natural "this feels off". No common synonyms for this domain are missing, so anchor 5 fits better than the 'a few natural terms missing' of anchor 4.

Distinctiveness Conflict Risk

"The VS Code design philosophy" names a clear niche, but the trigger conditions — "any visual surface", "deciding a radius, spacing... color, or motion" — are vocabulary shared with generic frontend/design and styling skills, creating minor overlap risk. This fits anchor 4 ("mostly distinct; minor overlap risk with closely related skills") better than anchor 5's minimal-conflict profile.