Refactor — Expert Code Restructuring

Surgical code refactoring based on Martin Fowler's (2nd Edition) catalog. Improve structure, readability, and maintainability without changing external behavior. Gradual evolution, not revolution.

When to Use

This skill activates when:

• Code is hard to understand or maintain
• Functions/classes have grown too large
• Code smells are detected
• Adding features is difficult due to poor structure
• User explicitly requests refactoring, cleanup, or improvement
• User says: refactor, 重构, clean up, improve code, code smell, extract method, rename, simplify

The Golden Rules