Circuit Breaker is a weekly newsletter at the intersection of AI governance and the agent economy. While most AI coverage chases model launches and benchmark scores, Circuit Breaker focuses on what actually changes how organisations use AI: regulations taking effect, compliance gaps emerging, and the economic infrastructure being built for autonomous agents. Each issue combines original analysis with carefully sourced research — covering EU and US regulatory developments, real-world compliance challenges, and the mechanics of how AI agents are beginning to transact, identify themselves, and operate at scale. For executives, policy professionals, and builders who need clarity without noise.