Conciseness

The body teaches only what Claude would not already know — the specific template, lean-by-default philosophy, and question-asking protocol — using terms like "SMART OKR format" and "6-part JTBD template" without tutorials. It is not a 5 because the Notes section restates earlier points ("Lean is the default; detail is on request" and "Flag assumptions clearly" duplicate the Lean-by-default and 7.4 guidance).

Actionability

Guidance is concrete and executable for a document-writing skill: a numbered interaction protocol ("up to three short questions in one message"), a named 6-part value proposition template with per-part definitions, per-section question checklists, and a specific output filename (`PRD-[product-name].md`). It falls short of fully copy-paste-ready because there is no worked example PRD or sample value proposition statement to anchor the format.

Workflow Clarity

The 7-step instruction sequence (gather input → ask clarifying questions → research → think → write → save → report omissions) is clearly ordered with real checkpoints ("stop and ask about them first... no PRD in that reply"; "If they don't line up, fix that before anything else") and a review checklist section. It is not a 5 because there is no final step verifying the written PRD against the review checklist before presenting it.

Progressive Disclosure

The single-file body is well organized with clear headers (Purpose, Lean by default, Instructions, Reviewing, Notes) and no nested references; all content is appropriately inline for a template skill of ~95 lines. It is not a 5 because it exceeds the simple-skill threshold and its external pointers (the optional value-proposition plugin skill, Further Reading links) are soft mentions rather than a clearly signaled reference structure.

Specificity

The description enumerates multiple concrete actions comprehensively: creating a PRD with a fully named 8-section template ("summary, contacts, background, objective, market segments, value propositions (6-part JTBD template), solution, and release"), plus "reviewing an existing PRD" and offering "a fuller spec on request". It matches the comprehensive-coverage anchor; there is no meaningful capability left unstated for this domain.

Completeness

It explicitly answers both questions: the "what" is concrete ("Create a lean, decision-ready Product Requirements Document with an 8-section template...") and the "when" is an explicit "Use when..." clause with concrete trigger phrases. Both are stated as clearly as the 5-anchor example.

Trigger Term Quality

"Use when writing a PRD, documenting product requirements, preparing a feature spec, or reviewing an existing PRD" covers good natural terms users would say. It misses common synonyms such as "requirements doc", "product spec", or "product brief", so it falls just short of the comprehensive-synonyms anchor.

Distinctiveness Conflict Risk

It occupies a clear niche (PRD writing) with distinct triggers (PRD, product requirements, feature spec) unlikely to fire for unrelated skills. Third-person voice is used consistently, and specificity of the template enumeration further separates it from generic document-writing skills.