Glossary

Code Review

Code review is the process of another developer examining code before it is merged into the main branch. It catches bugs, spreads team knowledge, and maintains codebase quality. Research shows code review finds ~60% of defects early.

What to check

Correctness: does the code solve the task? Are there edge cases?
Readability: is it easy to read and maintain?
Security: SQL injection, XSS, data leaks
Performance: N+1, missing indexes, unnecessary queries
Adherence to the project's style and conventions

Rules for a good reviewer

Comment on the code, not the author: "the function does X, but Y would be better" instead of "you did it wrong"
Explain why, not just what to change
Distinguish blockers from suggestions: nit: — not critical