Conciseness

The body is mostly commands and steps, but the inline Error Handling table duplicates errors.md, the Examples section rehashes the Instructions, and the filler line 'Trigger with relevant phrases based on skill purpose' adds nothing. Not level 3 because of this redundancy; not level 1 because it does not explain concepts Claude already knows.

Actionability

Instructions give fully executable, copy-paste-ready commands such as `npx prettier --check "**/*.{js,jsx,ts,tsx,json,css,md}" --ignore-path .prettierignore` and `npx prettier --write`, with specific globs and paths. Not below 3 because the guidance is concrete and complete.

Workflow Clarity

A clear 7-step sequence with a validate-fix-revalidate loop: step 3 runs `--check` to identify files, step 4 applies `--write`, and step 7 runs a final `--check` to confirm compliance — appropriate validation for a batch write operation. Not level 2 because explicit validation checkpoints are present.

Progressive Disclosure

References are one level deep and listed in a Resources section, but content that should live only in references is duplicated inline (Error Handling table vs errors.md, Instructions vs implementation.md), and examples.md is an unreferenced placeholder ('Example usage patterns will be demonstrated in context.'). Not level 3 because the split is not clean; not level 1 because navigation and sectioning exist.

Specificity

Names two concrete actions ('formats and validates code files using Prettier') plus specific file types, but hedges with vague phrases 'and other formatting tools' and 'many other file types', and opens with the ungrammatical 'Execute automatically formats'. Not the level-3 anchor because it does not list multiple specific concrete actions as comprehensively as the example; not level 2-below because it does name the tool and concrete verbs.

Completeness

Explicitly states what the skill does (formats and validates code files) and provides an explicit 'Use when users mention...' trigger clause, satisfying both the what and the when. Not level 2 because the when is explicit rather than implied.

Trigger Term Quality

The 'Use when' clause enumerates natural user phrasings — 'format my code', 'fix formatting', 'apply code style', 'check formatting', 'make code consistent', 'clean up code formatting' — giving good coverage of terms a user would actually say.

Distinctiveness Conflict Risk

Targets a clear niche (Prettier-based code formatting) with distinct formatting-specific triggers, making it unlikely to fire for unrelated skills. Not level 2 because the scope and triggers are specific enough to avoid overlap.