<objective A bug you cannot reproduce is a bug you cannot fix or prove fixed. This skill takes a thin, hand-wavy report ("order total is wrong sometimes") and drives it to a VERIFIED minimal reproduction, a deterministic failing test written BEFORE the fix, a that names the introducing commit, and a structured evidence block in the ticket. The discipline it enforces: reproduce before theorizing, minimize one cut at a time, freeze time/seed/network so the repro fails identically every run, watch the test go red first, and confirm the fix flips it green — and that reverting the fix turns it red…