Jev router writes each handoff as queue/[destination]/[uuid].json. CHOICE names the next worker; below 0.85 goes to review.

Guide with video. 0xVarian describes a Jev router: CHOICE returns the next worker from a labeled set with confidence, a gate under 0.85 becomes review, the folder write needs no broker, each job is one uuid4 JSON file, and dispatch reads 8 workers in parallel. The post says 10,000 decisions cost $0.02 total at a 251ms median, instead of standing up Kafka.