Use when the user asks to refactor, clean up, simplify, extract, rename, remove duplication, improve readability, split files, improve separation of concerns, or make code easier to test while preserving externally observable behavior. This skill guides conservative, test-protected refactoring throu
Use when the user asks to refactor, clean up, simplify, extract, rename, remove duplication, improve readability, split files, improve separation of concerns, or make code easier to test while preserving externally observable behavior. This skill guides conservative, test-protected refactoring through Baseline → Transform → Same Tests by defining the behavior boundary, running baseline tests befor