The body contains no concept-explanation padding (no 'what is due diligence' preamble); every section delivers usable questions or actionable structure, and the 'Important Notes' are terse guardrails. It assumes Claude's competence and every line earns its place.

Concrete, copy-ready guidance throughout: explicit question banks per meeting type, a structured 5-step workflow, a defined one-page output format with six sections, and specific constraints like 'Keep the question list to 15-20 max'. For an instruction-only skill this is highly actionable.

A clearly sequenced 5-step process (Context → Questions → Benchmarks → Red Flags → Output) with input and output checklists. The task is generative rather than destructive/batch, so the missing-validation cap does not apply, and the structured output section acts as an effective checklist.

It is a single ~100-line file with no external references, and the large inline question banks (the Management Presentation section alone is ~25 questions) are content that could be split into separate reference files. Organization is clear so it is above a 1, but it is not a 3 because nothing is offloaded to one-level-deep references.

Lists multiple concrete actions — 'Generates targeted question lists, benchmarks to reference, and red flags to probe' — and enumerates the meeting types it handles, matching the 'lists multiple specific concrete actions' anchor.

Explicitly answers both what ('Generates targeted question lists, benchmarks to reference, and red flags to probe') and when ('Use before any diligence meeting or call. Triggers on...') with explicit triggers.

'Triggers on "prep for management meeting", "diligence call prep", "expert call questions", "customer reference questions", or "meeting prep for [company]"' are natural phrases a user would actually say, giving good coverage.

A clear niche (due diligence meeting prep) with distinct, specific triggers unlikely to fire for unrelated skills; uses third-person voice throughout with no over-claims.