Conciseness

Dense with non-generic specifics (named guests, "fewer than 10 moving pieces", timestamped quotes) and no explanation of concepts Claude already knows, but minor padding exists: "56 insights from 38 Lenny's Podcast guests" repeats the frontmatter in the intro, and the Receipts section duplicates content already delegated to references/quotes.md. Not 5 because a few sections could be trimmed; not 3 because there is no over-explanation.

Actionability

Fully actionable for an instruction-only skill: a diagnose step capped at "max 4" questions, a situation→play routing table, numbered per-play steps, a fill-in deliverable template, and a 1/3/5-anchored grading rubric ending in "top 3 fixes". Specific guidance covers the common cases.

Workflow Clarity

Clear sequence (Diagnose → Pick the play → Run it → Deliverable → Grade → top 3 fixes) with explicit validation checkpoints and feedback loops: "Stop when it passes two tests... If not, keep shaping" and "Shaped output test: engineer <name> confirmed... yes/no" in the deliverable. The grading rubric acts as a checklist.

Progressive Disclosure

Well-signaled, one-level-deep references that exist on disk ("references/frameworks.md: every framework in this skill, how to run it"; "references/quotes.md: verified quotes with timestamps"), plus related-skill handoffs. Not 5 because the inlined Receipts quotes duplicate references/quotes.md, content that belongs in the referenced file only.

Specificity

"Writes (or rewrites) a spec, PRD, PR-FAQ or shaped pitch" and "grades it" list several concrete actions with named artifact types, matching the 'several specific actions; minor gaps' anchor. Not 5 because "grades it against what the best product teams actually do" leaves the grading mechanism and output unspecified; not 3 because more than 1-2 actions are named.

Completeness

Explicitly answers both: what ("Writes (or rewrites) a spec, PRD, PR-FAQ or shaped pitch and grades it") and when ("Use when you ask 'write a PRD'...") with concrete trigger phrases, in third-person voice. Matches the top anchor exactly.

Trigger Term Quality

The trigger list — 'write a PRD', 'how do I spec this', 'PR/FAQ', 'working backwards doc', 'shape this project', 'do we even need a PRD', 'engineering says the spec isn't detailed enough' — comprehensively covers natural phrasings users would actually say, including synonyms (spec, PRD, PR-FAQ, working backwards).

Distinctiveness Conflict Risk

Clear niche (spec/PRD/PR-FAQ writing and grading) with distinct triggers like 'working backwards doc' and 'shape this project' that no adjacent skill would claim. Minimal conflict risk; not 4 because the triggers are niche-specific rather than merely 'mostly distinct'.