Algorithmic Circuit Breakers: Engineering Hard Stop Safety Into Autonomous Agent Workflows

Autonomous agents don’t just fail. They persist. They retry, replan, and chain tools until something “works.” That persistence is exactly what makes agents valuable, and exactly what makes them hazardous in production without strict execution controls.

Algorithmic circuit breakers (ACBs) are an engineering pattern for hard stop safety. They are stateful, external controls that can pause or halt an agent run based on measurable signals, independent of what the model outputs next.