Model-swap loop

This skill is the map. Each stage has its own skill; load it when you reach the stage. The person stays in the coding agent for choosing, defining and rerunning, and goes to the Metergraph app to read the detailed report and inspect evidence.

choose workload → choose traces and models → define or refine eval
      → run analysis → summary + report link → (person inspects evidence in the app)
      → refine and rerun ↺