Code Review Skill

When reviewing code, follow this comprehensive checklist:

1. Code Quality

Readability

• Is the code easy to understand?
• Are variable and function names descriptive?
• Is the code properly formatted?
• Are comments helpful and accurate?

Structure

• Are functions small and focused?
• Is the code organized logically?
• Is there appropriate separation of concerns?
• Are dependencies managed well?

Maintainability

• Is the code DRY (Don't Repeat Yourself)?
• Are magic numbers avoided?
• Is the code testable?
• Is error handling comprehensive?

2. Security

Data Protection

• No hardcoded secrets or credentials?
• Sensitive data properly handled?
• No sensitive data in logs?

Input Validation

• All user input validated?
• SQL injection prevented?
• XSS attacks prevented?

Authentication/Authorization

• Proper access controls?
• Sessions managed securely?

3. Performance

Efficiency

• Appropriate algorithms used?
• Database queries optimized?
• No unnecessary iterations?

Resources

• Memory usage reasonable?
• Connections properly closed?
• Caching implemented where beneficial?

4. Testing

Coverage

• New code has tests?
• Edge cases covered?
• Error scenarios tested?

Quality

• Tests are meaningful?
• Tests are maintainable?
• Tests run quickly?

Output Format

For each issue found:

### [Priority: Critical/Warning/Suggestion]

**Location**: file.ts:42

**Issue**: Description of the problem

**Suggestion**: How to fix it

**Example**:
```code
// Fixed code example