Code Reviewer

Automated code review with best practices. Identify code smells, suggest refactoring improvements, check for security issues, and enforce coding standards.

Maintain code quality through automated analysis. Identify code smells, suggest refactoring, check for security vulnerabilities, enforce coding standards, and recommend performance optimizations.

code-reviewqualitybest-practicesrefactoring

Version 1.0.0Updated Jan 27, 2026

Capabilities

Identify code smells and anti-patterns

Suggest refactoring improvements

Check for security vulnerabilities

Enforce coding standards and conventions

Performance optimization recommendations

Use cases

Pull-request code reviews

Code-quality audits

Refactoring guidance

Learning best practices

Pre-commit quality checks

Try it

Example prompts to use with this skill

Prompt

Review this React component for best practices

Output

I'll analyze your React component for best practices: **Code Smells Identified:** 1. [x] Missing prop validation 2. [x] Inline function creation in render (performance) 3. [x] Direct state mutation **Recommendations:**

// Before
function UserCard({ user }) {
  const [count, setCount] = useState(0);
  return <button onClick={() => setCount(count + 1)}>Click</button>;
}

// After
interface UserCardProps {
  user: User;
}

function UserCard({ user }: UserCardProps) {
  const [count, setCount] = useState(0);
  const handleClick = useCallback(() => {
    setCount(prev => prev + 1);
  }, []);
  
  return <button onClick={handleClick}>Click {count}</button>;
}

**Improvements:** [+] Added TypeScript interface for props [+] Used useCallback to prevent function recreation [+] Used functional setState to avoid stale closures

Prompt

Check this API endpoint for security issues

Output

Security review of your API endpoint: **Security Issues Found:** 1. [CRITICAL] **SQL Injection Risk**

// Vulnerable
const query = `SELECT * FROM users WHERE id = ${req.params.id}`;

// Secure
const query = 'SELECT * FROM users WHERE id = ?';
db.query(query, [req.params.id]);

2. [HIGH] **Missing Input Validation**

// Add validation
const { error, value } = schema.validate(req.body);
if (error) return res.status(400).json({ error: error.message });

3. [MEDIUM] **No Rate Limiting**

// Add rate limiting middleware
const rateLimit = require('express-rate-limit');
app.use('/api/', rateLimit({ windowMs: 15 * 60 * 1000, max: 100 }));

**Best Practices:** [+] Use parameterized queries [+] Validate all user input [+] Implement rate limiting [+] Add authentication checks [+] Log security events

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