conductor
Conductor is an open-source durable execution platform for microservices, AI agents and adaptive workflow graphs. Workflows are defined as graphs (JSON definitions) whose runtime choices, such as loops, branching, fan-out, tool calls, approvals, retries and cancellation, are executed durably by the Conductor server. It began at Netflix; the original Netflix/conductor repository is now archived, and conductor-oss is the actively developed open-source line.