Lists multiple concrete actions: 'structure', 'classify', 'write documentation', 'improve documentation', 'restructure docs', 'decide what type of doc to write', 'classify existing content'. These are specific, actionable verbs tied to a clear domain.

Clearly answers both 'what' (structure, classify, and write documentation using the Diátaxis framework) and 'when' with explicit 'Use when...' clauses covering multiple trigger scenarios including writing, improving, restructuring, and classifying documentation.

Excellent coverage of natural terms users would say: 'docs', 'README files', 'guides', 'tutorials', 'how-to guides', 'API references', 'documentation architecture', 'restructure docs', 'Diátaxis'. These cover many variations a user might naturally use when requesting documentation help.

The Diátaxis framework is a specific, well-defined niche that distinguishes this from generic writing or documentation skills. The mention of the four Diátaxis categories (tutorials, how-to guides, reference, explanation) and the framework name itself create clear, distinct triggers unlikely to conflict with general writing skills.

The content is lean and efficient. It doesn't explain what documentation is or why it matters — it jumps straight into the framework's structure. Every section earns its place: the matrix, bullet points, compass, workflow, example, and common mistakes table are all dense with actionable information. No padding or unnecessary context.

The skill provides concrete, specific guidance: a classification matrix, bullet-pointed principles for each type, a step-by-step application workflow, a worked example showing the classification process in action, and a common mistakes table with specific fixes. While there's no code (appropriate for an instruction-only skill), every piece of guidance is specific and directly applicable.

The 'How To Apply' section provides a clear 5-step sequence: classify → check for mixing → separate → apply principles → link between types. The compass provides a decision framework (two questions → intersection). The worked example demonstrates the full workflow. For a non-destructive documentation task, this level of workflow clarity is excellent — no validation gaps exist for this domain.

Excellent progressive disclosure structure. The main file provides a concise overview with key principles for each type, then clearly signals 12 reference files for deep dives in a well-organized table. References are one level deep and clearly named. The repeated pattern of 'Load references/X.md for full guidance' is consistent and easy to follow. However, no bundle files were provided to verify the references exist — scoring based on the structure as designed.