This skill should be used when the user says "deduplicate findings", "dedup findings", "compare findings", "find duplicate findings", "merge findings", "clean up findings", "/finding-dedup", or wants to identify and resolve duplicate or overlapping security findings in a project. Classifies finding pairs as duplicate (can delete one) or similar (different scope, may merge). This skill is NOT for drafting new findings (use /finding-draft) or reviewing individual findings (use /finding-review).