Names the domain (git commits) and some actions (creating commit messages, applying 7 rules, imperative mood, conciseness), but doesn't list multiple concrete specific actions like 'analyze diffs', 'format subject lines', 'wrap body at 72 chars'.

Clearly answers both 'what' (applies 7 rules for great commit messages with focus on conciseness and imperative mood) and 'when' (explicitly starts with 'Use when creating git commits to ensure commit messages follow project standards').

Includes 'git commits' and 'commit messages' which are natural terms users would say, but misses common variations like 'commit msg', 'staged changes', 'git message', 'conventional commits', or 'git log'.

Clearly scoped to git commit message formatting with specific methodology (7 rules, imperative mood), making it unlikely to conflict with other skills like general git operations or code review skills.

The skill is mostly efficient but includes some unnecessary content. The 'Bad Examples' section with detailed explanations of why they're bad adds bulk, and some principles (like 'Be concise, not verbose') are things Claude already understands. The good/bad example pairs are valuable but the 'Problem:' explanations could be trimmed.

Provides concrete, copy-paste ready examples of both good and bad commit messages, an executable HEREDOC format for proper commit formatting, specific character limits, and a clear checklist. The guidance is specific and directly usable.

For a single-task skill (writing commit messages), the workflow is unambiguous: follow the 7 rules, use the HEREDOC format, check against the checklist. The checklist serves as an explicit validation checkpoint before committing, which is appropriate for this scope.

For a self-contained skill under 80 lines with no need for external references, the content is well-organized with clear sections (rules, principles, format, examples, checklist) that progress logically from rules to application to verification.