KISS DRY SOLID YAGNI Refactor

Refactor selected files (or current diff) to align with KISS, DRY, SOLID, and YAGNI while strictly preserving behavior.

Usage

/refactor [file_or_pattern]

Examples:

/refactor                              # Refactor current diff
/refactor src/core/*.py                # Refactor specific files

Principles Applied (In Order)