Code Review

Perform a systematic code review covering these categories:

Review Checklist

1. Correctness

• Logic errors, off-by-one, null/None handling
• Edge cases: empty inputs, large inputs, concurrent access
• Error handling: are exceptions caught and handled properly?

2. Security

• Input validation and sanitization
• SQL injection, XSS, command injection
• Secrets in code, hardcoded credentials
• Authentication and authorization checks

3. Performance

• Unnecessary loops, N+1 queries
• Missing indexes for database queries
• Large memory allocations, unbounded collections
• Blocking calls in async code

4. Style & Maintainability

• Naming clarity (variables, functions, classes)
• Function length — split if >30 lines
• Dead code, commented-out code
• Missing type annotations

5. Testing

• Are new code paths covered by tests?
• Are edge cases tested?
• Are error paths tested?

Output Format

For each issue found:

• File:line — category — description — suggested fix
• Severity: critical / warning / suggestion