Lean, punchy prose ('Paths rot.', 'Documentation bloat kills docs.') with no concept re-explanation or padding; every section earns its place and it assumes Claude's competence, matching the top anchor.

Gives concrete executable guidance such as target file paths (docs/<name>.md, README.md), the Agent(subagent_type=Explore) cold-reader offer, and appending to .gsd/DECISIONS.md; as an instruction-only skill this satisfies the actionable bar without needing code.

Four clearly sequenced stages with numbered steps, an explicit reader-test validation checkpoint with a fix-and-recheck loop ('If no, identify the missing piece and add it'), and a success-criteria checklist, matching the 'clear sequence with explicit validation steps' anchor.

A single self-contained SKILL.md cleanly organized into semantic sections (<objective>, <process>, <anti_patterns>, <success_criteria>) with no external references needed and no nested reference chains, satisfying the well-organized-sections top anchor for a short, single-process skill.

Enumerates multiple concrete document types ('proposals, technical specs, decision docs, README sections, ADRs, and long-form prose') and a three-stage process, matching the 'lists multiple specific concrete actions' anchor rather than the partial coverage of a 2.

Clearly states both what (collaborative document authoring workflow) and when (an explicit 'Use when asked to...' clause with multiple triggers), matching the 'both what AND when with explicit triggers' anchor.

Explicit natural triggers users would say ('write the docs', 'draft a proposal', 'write a spec', 'write an RFC', 'write the README') give good coverage of common phrasings, satisfying the top anchor.

Scopes to free-form docs living under docs/, mintlify-docs/, or gitbook/ and contrasts with GSD scaffolded templates, carving a distinct niche unlikely to trigger the wrong skill.