AgentFuse is a logical circuit breaker for long-range autonomous agents. When an agent runs for hours without supervision, it fails quietly looping on the same tool call, drifting from its goal, stalling in logic traps, or burning tokens with nothing to show. AgentFuse acts as an independent supervisor that watches every tool call, route, and token in real time, and trips the moment one of these failure modes crosses a threshold. On a trip it freezes the run and asks a separate reasoning model to generate a steering correction, injects it back into the agent, and resumes or escalates to a human when recovery isn't safe. It ships as a framework-agnostic Python core with first-class OpenAI AgentKit support (plus OpenAI SDK and LangGraph), and a live observability dashboard that replays every trip and recovery. In short: autonomy that knows when it's going wrong and steers itself back.