Refactoring Catalog

Apply proven refactoring patterns to improve code structure while preserving behavior. Based on Martin Fowler's refactoring catalog with practical Python examples.

When to Use This Skill

• Reducing code complexity and improving readability
• Eliminating code smells and technical debt
• Preparing code for new features
• Improving testability of existing code
• Applying design patterns to solve structural issues
• Breaking up large classes or functions

Safe Refactoring Workflow

The Golden Rule

Never change behavior while refactoring. Never refactor while changing behavior.