proj-refactor

Safe incremental code refactoring improves maintainability by applying established patterns in small steps. It enforces testing before and after changes to ensure external behavior remains unchanged throughout the process.

Refactor code without breaking functionality by writing tests before changing code, applying small incremental changes, and validating behavior after each step. This ensures rollback readiness and preserves external behavior.

Apply refactoring patterns when existing modules exhibit code smells or reduced maintainability. The process involves identifying small refactoring opportunities, extending tests, and extracting methods or classes incrementally.

Structure small-step code refactoring by documenting decisions, updating task lists, and synchronizing next-step instructions after each change. This maintains traceability and ensures rollback readiness throughout the refactoring process.

Existing tests are strongly recommended before refactoring to validate behavior. If tests are missing, the refactoring process requires writing or extending tests before applying incremental changes to ensure safety.

Refactoring introduces regressions when changes are too large or lack proper test coverage. Applying small incremental changes with tests run before and after each step prevents regressions and maintains external behavior.