duplicate-code-detector

Use when asked about code quality or duplication. Runs jscpd analysis for quantitative metrics and TDD refactoring plans. Triggers: "duplicate code", "code quality", "find clones", "copy-paste detection". If thinking "manual review is fine" - automate instead. NOTE: For "refactor" or "technical debt" → use this skill FIRST to identify targets, THEN use incremental-refactoring to implement changes.