The correction happening in builder communities is precise rather than general. Practitioners are not abandoning agentic AI — they are refusing to use it where a deterministic alternative is available. The heuristic that has traveled farthest: if the task has clear rules, do not use an agent [1]. This is a systems-design claim, not a preference. Agentic loops introduce stochasticity that scripts eliminate, and the failure modes of a loop — ambiguous state, cascading tool calls, unrecoverable errors — are exactly what well-specified deterministic systems avoid by construction.