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name: code-review description: Use this skill for code review and PR review tasks. Covers review methodology, what to flag, what to skip, and output structure.

Code Review

Review a GitHub pull request for substantive issues. Focus on what matters, skip what doesn't.

Steps

1. Run gh pr view {pr_number} --json title,body,files to understand the PR's purpose and scope.
2. Run gh pr diff {pr_number} to read the full diff.
3. Before commenting, read surrounding code to understand full context — a pattern that looks wrong in isolation may be an established convention.

Focus Areas (priority order)

1. Correctness — Logic bugs, edge cases, error handling
2. Security — Input validation, injection risks, secrets exposure
3. Reliability — Race conditions, failure modes, resource leaks
4. Performance — Inefficient algorithms, N+1 queries, unnecessary work
5. Breaking changes — API/behavior changes affecting callers
6. Test coverage — Are new code paths tested?

Skip style/formatting unless it materially impacts readability. Do not nitpick naming, style preferences, or issues linters catch.

Severity Levels

• Blocking: Must fix before merge (bugs, security, significant reliability/performance issues, breaking changes)
• Non-blocking: Suggestions for improvement (optional)

Output Format

Findings

For each issue found:

[Issue Title]

• Severity: blocking | non-blocking
• Location: file_path:line_number
• Description: What the issue is and why it matters
• Suggested Fix: Concrete code change or approach

If no issues found, state that the changes look correct and explain why.

Summary

Overall assessment: is the PR ready to merge, or does it need changes? List the most important issues if any.