Agent Skills: code-refactoring

Guides systematic code refactoring to improve code quality, maintainability, and design. Identifies code smells, applies refactoring patterns, ensures test coverage, and follows safe refactoring practices. Produces cleaner, more maintainable code while preserving functionality. Use when improving code quality, eliminating technical debt, preparing for feature additions, addressing code smells, or when users mention refactoring, code cleanup, improving design, reducing complexity, or modernizing legacy code.