Every line earns its place. No explanation of what Conventional Commits is or how git works. The rules are terse, the examples are tight, and the anti-patterns (❌) are single-line contrasts. No padding or unnecessary context.

Provides exact format templates, concrete type lists, specific character limits, complete before/after examples with real commit messages, and clear boundary rules. Claude can immediately generate correct output from this.

This is a single-task skill (generate a commit message) with an unambiguous sequence: read diff → apply rules → output code block. The decision tree for when to include a body vs. subject-only is explicit, and the 'Auto-Clarity' section serves as a validation checkpoint for critical cases.

For a standalone skill under 50 lines with no need for external references, the content is well-organized into logical sections (Rules, Examples, Auto-Clarity, Boundaries) that are easy to scan. No monolithic walls of text or unnecessary nesting.

Lists multiple concrete actions: generates commit messages, cuts noise while preserving intent/reasoning, uses Conventional Commits format, enforces subject ≤50 chars constraint, includes body only when 'why' isn't obvious.

Clearly answers both 'what' (ultra-compressed commit message generator with Conventional Commits format, subject ≤50 chars, body only when needed) and 'when' (explicit 'Use when...' clause with multiple trigger phrases plus auto-trigger condition).

Excellent coverage of natural trigger terms: 'write a commit', 'commit message', 'generate commit', '/commit', '/caveman-commit', and 'staging changes'. These are phrases users would naturally say when needing this skill.

Highly distinctive with a clear niche: commit message generation with a specific style (ultra-compressed, caveman). The unique slash commands and specific format constraints make it unlikely to conflict with other skills.