Names the domain (code reviews) and lists categories (functionality, security, performance, maintainability), but doesn't describe concrete actions like 'check for SQL injection', 'verify error handling', or 'flag N+1 queries'. The categories are high-level rather than specific actions.

Describes what it is (a checklist for code reviews) but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. Per the rubric, a missing 'Use when...' clause caps completeness at 2, and the 'what' is also weak (it's a noun phrase describing a thing rather than actions), so this scores a 1.

Includes 'code review' which is a natural trigger term, and related terms like 'security', 'performance', 'maintainability'. However, it misses common variations like 'PR review', 'pull request', 'review checklist', 'code quality', or 'review my code'.

The 'code review checklist' framing is somewhat specific, but could overlap with general coding skills, security audit skills, or code quality/linting skills. The broad categories (security, performance, maintainability) could trigger conflicts with more specialized skills in those areas.

Extremely verbose at ~350+ lines. Extensively explains concepts Claude already knows (what code review is, what edge cases are, what SQL injection is). The checklist items are largely common knowledge for Claude. The 'When to Use This Skill' section, 'How It Works' steps, 'Common Pitfalls', and 'Best Practices' sections are all padded with obvious information that wastes tokens.

The checklists provide some concrete structure and the code examples (good/bad patterns) are executable and specific. However, much of the content is descriptive rather than instructive—it lists what to check but doesn't provide concrete commands, tools, or automated workflows Claude could execute. The checklist format is useful but largely generic.

Steps are listed (Step 1-6) but they are essentially just categories of things to check, not a true workflow with validation checkpoints or feedback loops. There's no explicit guidance on what to do when issues are found, no prioritization of findings, and no clear decision points (e.g., when to block vs. approve with comments).

Monolithic wall of text with everything inline. The three detailed example checklists (functionality, security, code quality) could easily be separate files. External links at the bottom are to third-party resources rather than organized companion files. The 'Related Skills' section references skills that may not exist. No content is appropriately split into referenced files.