Code Review Checklist

18 items · Technical · Medium difficulty · 30 min

A concise checklist to run thorough, consistent code reviews every time.

• Checkout branch and pull latest changes

  Ensure you're reviewing the most recent code and PR updates.

• Build and run the project locally

  Reproduce the app to validate behavior before reviewing.

• Run automated tests and linters

  Execute unit/integration tests and static analysis tools.

• Confirm changes match the ticket or PR description

  Verify the implementation meets the stated requirements.

• Review architecture and design impact

  Check that the change fits overall design and patterns.

• Verify descriptive names and concise functions

  Prefer clear variable/function names and single-responsibility functions.

• Check for obvious bugs and logic errors

  Scan control flow, branches, and state changes for mistakes.

• Trace data flow for core functions

  Follow inputs to outputs to catch incorrect transformations.

• Verify error and null handling

  Ensure errors are handled, propagated, or logged appropriately.

• Validate input handling and edge cases

  Test boundary values, empty inputs, and invalid formats.

• Scan for security issues

  Look for injections, auth bypasses, secrets in code, and unsafe deserialization.

• Assess performance implications

  Spot N+1 queries, heavy allocations, and blocking operations.

• Ensure tests cover new code

  Confirm new logic is backed by automated tests where appropriate.

• Confirm unit tests for core logic

  Check that unit tests exercise key branches and failure modes.

• Confirm integration or end-to-end tests where applicable

  Ensure system-level behavior is validated for cross-service changes.

• Verify error messages and logging

  Make logs actionable and avoid leaking sensitive data.

• Check for proper documentation and comments

  Update README, docstrings, and PR notes to reflect changes.

• Leave constructive feedback and approve or request changes

  Be specific, cite lines, and suggest concrete improvements.

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