A Constructive Code Review Checklist for Small Teams

A good code review improves correctness and maintainability without turning into a contest of personal preferences. Reviewers should focus first on behavior, security, data integrity, and clarity.

Read the change in context and compare it with the issue or acceptance criteria. Check error handling, authorization, validation, concurrency, and the impact on existing data. Look for missing tests around edge cases and failure paths, not only the happy path. For database changes, consider how the change behaves on real data and during deployment.

Separate required corrections from optional style suggestions. Explain why a concern matters and offer a concrete alternative where possible. Automated formatters and static analysis can handle repeatable style rules so reviewers can spend time on design and risk.

Keep reviews small enough to understand, and ask questions when intent is unclear. The author remains responsible for the change, while the reviewer helps uncover blind spots. A respectful, specific review culture helps a team ship safer code and makes contributors more willing to learn.