Conciseness

The body is directive throughout with no explanation of concepts Claude already knows, but routing rules are stated multiple times in slightly different words — audit routing appears in both 'Router Only' and '$audit', the ideate/get-context sequencing in 'Router Only', 'No Visual Target, No Build', and the '$ideate'/'$get-context' sections, and 'Router Only'/'Skills' both repeat that this is only a router. This noticeable redundancy matches anchor 3 ('mostly efficient but... could be tightened') rather than anchor 4, since several full sections could be collapsed.

Actionability

For an instruction-only router skill the guidance is concrete and executable: exact skill tokens to load ('$audit', '$get-context', '$url-to-code'), copy-paste fallback message blocks, a literal browser API call ('agent.browsers.get("iab")'), and precise gating ('Show exactly three visual options and wait for the user to choose one'). It falls short of anchor 5 only because several directives depend on external artifacts (the referenced communication-protocol.md, critical-overrides.md, and sibling SKILL.md files) that are not present in this bundle, so the guidance cannot be fully executed as shipped.

Workflow Clarity

Routing decision flows are clearly sequenced with explicit checkpoints: 'run $audit first, then continue through the appropriate normal workflow', 'Do not scaffold, edit files, or start a server before a visual option is selected', and 'Only proceed after the user agrees'. This matches anchor 4 (clear sequence, most checkpoints present); it does not reach anchor 5 because error-recovery/feedback loops are absent — e.g., what to do when the Browser skill or its setup fails — and some sequences rely on the external focused skills' behavior rather than steps defined here. No destructive or batch operations apply, so no cap is triggered.

Progressive Disclosure

The body has clear section headers and its references are well-signaled with markdown links ('[$critical-overrides](../../references/critical-overrides.md)', '[$user-context](../user-context/SKILL.md)'), but the actual bundle contains no references/, scripts/, or assets/ directories, so every referenced path resolves outside the skill directory and cannot be verified as reachable — buried/unverifiable navigation matches anchor 3 ('references present but not clearly signaled / could be better organized') rather than anchor 4. Additionally, the per-skill routing descriptions in the Skills section largely duplicate content that belongs in the focused skills' own files, which could be split out.

Specificity

The description names several concrete capability domains — 'explore a design, research UX, audit or critique a flow, faithfully clone a visual source, check a built design, or share a prototype' — which are specific actions, but it never states what the skill itself does (route to focused Product Design skills), leaving a minor gap versus the comprehensive anchor 5.

Completeness

The 'when' is explicit and thorough ('Use when Product Design is explicitly invoked, or when the user's main goal is to...') plus an explicit negative boundary ('Do not use Product Design for ordinary implementation unless the user explicitly asks for it'), satisfying the 'Use when' requirement. However, the 'what' — that this is a router/index for the Product Design plugin — is only implied through the enumerated activity domains, not explicitly stated, so it does not reach anchor 5.

Trigger Term Quality

Natural phrases users would say are well covered — 'audit or critique a flow', 'faithfully clone a visual source', 'share a prototype', 'research UX' — but a few common variants are missing (e.g., 'review', 'redesign', 'feedback', 'build a prototype'), matching anchor 4's 'good keyword coverage; a few natural terms missing'.

Distinctiveness Conflict Risk

The description is scoped to a clearly named niche ('Product Design') with distinct, differentiated triggers and an explicit do-not-use clause excluding 'ordinary implementation', giving minimal conflict risk with other skills — matching anchor 5's 'clear niche with distinct triggers; minimal conflict risk'.