Autonomous batch migration of five files

Select five medium-risk files and let the agent migrate all of them with only the verifier loop as feedback - no manual review mid-task. Record elapsed time, how many passed cleanly, and how many needed manual fixes afterwards.

The first genuine test of whether the previous two tasks worked. The number that matters is how many needed fixing afterwards, because that is the real cost of delegation, and it is the input to the next task's rubric.