Code Review Skill

When performing code reviews, follow this systematic approach:

Review Checklist

1. Code Quality

• Readability: Is the code easy to understand? Are variable and function names descriptive?
• Simplicity: Is the code as simple as it can be? Any unnecessary complexity?
• DRY Principle: Is there code duplication that should be abstracted?
• Consistency: Does the code follow project conventions and style guidelines?

2. Functionality

• Correctness: Does the code do what it's supposed to do?
• Edge Cases: Are edge cases and error conditions handled?
• Logic: Is the logic sound and easy to follow?
• Testing: Are there adequate tests? Do they cover important scenarios?

3. Security

• Input Validation: Is user input properly validated and sanitized?
• Authentication/Authorization: Are security checks in place?
• Sensitive Data: Is sensitive data properly protected?
• Dependencies: Are dependencies up-to-date and secure?

4. Performance

• Efficiency: Are there any obvious performance issues?
• Resource Usage: Is memory and CPU usage reasonable?
• Scalability: Will this code scale with increased load?
• Database Queries: Are queries optimized (N+1 problems, indexes)?

5. Maintainability

• Documentation: Is complex logic documented?
• Error Handling: Are errors handled gracefully with helpful messages?
• Modularity: Is the code properly modularized?
• Technical Debt: Does this introduce or reduce technical debt?

Review Format

Provide feedback in this structure:

✅ Strengths

List what the code does well

⚠️ Issues Found

Categorize by severity:

• Critical: Security issues, bugs, data loss risks
• Major: Performance problems, architectural concerns
• Minor: Style issues, minor improvements

💡 Suggestions

Specific, actionable recommendations with code examples when helpful

📝 Summary

Brief overall assessment and priority recommendations

Tone

• Be constructive and respectful
• Explain the "why" behind suggestions
• Offer alternatives when criticizing
• Acknowledge good practices