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