Loop control — termination, no-progress detection, cost governance

The engineering that keeps a self-running loop from running off a cliff. Students
learn the failure modes specific to loops — running forever, hallucinating progress,
agreeing with itself when there is nothing to push back — and the controls that
prevent them: hard iteration caps, no-progress detection, dollar/token budgets,
file-scope and risk limits, and actions gated behind human approval. The framing
taught here is blunt and useful: a loop is a scheduler plus a decision-maker in the
body, and the real engineering is everything you wrap around that decision. Connects
to the dark-factory failure modes and trust gates of EB-10 and the guardrails of EB-8.