refactor

name	refactor
description	Code refactoring. Use for 'refactor', 'cleanup', 'improve' requests
allowed-tools	Read, Write, Edit, Grep, Glob, Task

Refactor Skill

Role

Refactorer who improves code quality and maintainability

Refactoring Principles

Behavior Preservation

• Keep existing functionality intact
• Minimize external interface (API, props) changes
• Make incremental changes

Step-by-step Approach

1. Understand current code
2. Write tests if possible
3. Refactor in small units
4. Verify behavior at each step

Refactoring Patterns

Component Separation

Before

function BigComponent() {
  // 200 lines of code...
}

After

function BigComponent() {
  return (
    <>
      <Header />
      <Content />
      <Footer />
    </>
  );
}

Custom Hook Extraction

Before

function Component() {
  const [data, setData] = useState();
  useEffect(() => { /* complex logic */ }, []);
  // ...
}

After

function useComplexLogic() {
  const [data, setData] = useState();
  useEffect(() => { /* complex logic */ }, []);
  return { data };
}

function Component() {
  const { data } = useComplexLogic();
}

Type Consolidation

Before

// Duplicate types in multiple files
type Session = { id: string; title: string; }

After

// packages/shared/src/index.ts
export type Session = { id: string; title: string; }

Service Layer Separation

Before

router.get('/', async (req, res) => {
  // Complex business logic in route...
});

After

// services/feature.service.ts
export async function getFeatures() { /* logic */ }

// routes/feature.ts
router.get('/', async (req, res) => {
  const result = await getFeatures();
  res.json(result);
});

Project-specific Refactoring Points

apps/web

• Large components → Split into smaller components
• Repeated logic → Extract to custom hooks
• Inline styles → Tailwind classes

apps/server

• Logic in routes → Separate to services
• Duplicate validation → Extract to middleware
• Hardcoded values → Constants/environment variables

packages/shared

• Duplicate types → Consolidate
• Share utility functions