Conciseness

The body is lean — terse bullets, a compact axis table, and on-demand "Load references/X.md" pointers — and avoids explaining concepts Claude already knows; it does not fall to level 2 because there is no padded or unnecessary explanation to tighten.

Actionability

For an instruction-only methodology skill the guidance is concrete and specific: per-type principle bullets, a 5-step "How To Apply" process, the two-question compass, a worked example, and a Common Mistakes table with fixes — actionable rather than merely descriptive.

Workflow Clarity

The "How To Apply" section gives a clear 1–5 sequence with an explicit check ("Check for type mixing") followed by a corrective step ("Separate mixed content"), and the Common Mistakes table acts as a review checklist; this is not a destructive/batch operation so the absence of a hard retry loop does not cap it at 2.

Progressive Disclosure

The body is an overview pointing to one-level-deep reference files, all 12 referenced paths (tutorials.md, how-to-guides.md, compass.md, etc.) exist in ./references/, and the closing "Deep Dives" table provides clear navigation — matching the anchor for a clear overview with well-signaled single-level references.

Specificity

Lists multiple concrete actions — "Structure, classify, and write documentation", "organizing documentation architecture", "improve documentation", "restructure docs", "decide what type of doc to write", "classify existing content" — matching the anchor for listing several specific concrete actions rather than naming only a domain.

Completeness

Explicitly answers both what (structure/classify/write docs via Diátaxis) and when with two "Use when..." clauses naming concrete triggers, satisfying the anchor for clearly answering both with explicit triggers.

Trigger Term Quality

Covers natural terms users would say — "docs", "README files", "guides", "tutorials", "how-to guides", "API references", "improve documentation", "restructure docs" — giving broad coverage of common phrasings rather than technical jargon.

Distinctiveness Conflict Risk

The Diátaxis framework is a distinct niche with specific documentation-architecture triggers unlikely to conflict with other skills; it does not fall to level 2 because its triggers are specific rather than broadly overlapping.