The body is mostly efficient and command-driven without explaining concepts Claude already knows, but the Examples section restate triggers/processes already covered in Instructions and the Output section elaborates what is already implied, so it could be tightened.

It provides copy-paste-ready commands throughout ('npx prettier --check "**/*.{js,jsx,ts,tsx,json,css,md}"', 'npx prettier --write src/app.js'), specific glob patterns, and a concrete error-handling table with executable fixes, matching the fully-executable anchor.

The 7-step sequence is clearly ordered with explicit validation checkpoints (step 3 --check to identify files, step 7 final --check to confirm compliance), forming a check-format-recheck feedback loop appropriate for this batch write operation.

References are real and one level deep (implementation.md, errors.md) and signaled at appropriate points, but the body's Instructions and Error Handling table substantially duplicate content that lives in those reference files, and examples.md is an unreferenced stub — content that should be separate is partly inline.

It names concrete tools and file types ('formats and validates code files using Prettier', 'Handles JavaScript, TypeScript, JSON, CSS, Markdown') but the action vocabulary is limited to format/validate, and 'other formatting tools' is vague, so it falls short of the multi-action anchor.

It explicitly answers what ('formats and validates code files using Prettier...') and when (an explicit 'Use when users mention...' trigger clause), matching the anchor that requires both with explicit triggers.

The 'Use when users mention' clause lists natural, varied phrases users would actually say ('format my code', 'fix formatting', 'apply code style', 'check formatting', 'make code consistent', 'clean up code formatting'), matching the good coverage anchor.

Code formatting via Prettier is a clear niche with distinct triggers, unlikely to fire for unrelated skills, matching the clear-niche anchor.