Names the domain (changelog files, commits, PR) and one action (create), but lacks detail on what the changelog contains, how it's formatted, or what constitutes 'important commits'.

Describes what it does (create changelog files) but has no explicit 'Use when...' clause or equivalent trigger guidance, which per the rubric should cap completeness at 2, and the 'what' is also quite thin, bringing it to 1.

Includes relevant terms like 'changelog', 'commits', and 'PR' that users might naturally say, but misses common variations like 'pull request', 'release notes', 'CHANGELOG.md', or 'change log'.

The combination of 'changelog' and 'PR' provides some distinctiveness, but could overlap with general PR review skills or release note generation skills. The scope is somewhat specific but not sharply delineated.

Mostly efficient but has some redundancy — the allowed types are listed once as a list and then again as filename examples. The good/bad example section is valuable but slightly verbose. Overall reasonable but could be tightened.

Provides concrete git commands, exact file naming conventions with examples, specific formatting rules (dash prefix, no line wrapping), and clear good/bad examples. A developer or Claude could follow this without ambiguity.

Steps are clearly sequenced (check commits → determine significance → create files), but there's no validation checkpoint — no step to verify the changelog files were created correctly, check for naming conflicts, or confirm the files match the actual commits. For a file-creation workflow this is a minor gap but still notable.

For a skill under 50 lines with a single focused task, the content is well-organized with clear sections (Instructions, Example) and no need for external references. The structure is appropriate for the complexity level.