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Ettore Di Giacinto
78f4ff7934
The three NATS queue groups jobs.new, jobs.mcp-ci.new and agent.execute are gone. Dispatching work is now a row in a work_claims table, taken by one frontend replica with SELECT ... FOR UPDATE SKIP LOCKED and driven on an agent worker as a streaming control RPC over that worker's tunnel. Exactly-one delivery among competing consumers is a database problem, not a broker feature. An agent worker has no database, so it never claims; it executes what the claiming replica hands it. A claim must not outlive the replica that took it. The reap releases a claim whose owner is no longer a live replica in the instances table, on the database clock, and never asks how long the claim has been held. A job that legitimately runs for an hour on a heartbeating replica is left alone, while a claim whose owner stopped heartbeating becomes claimable again within one liveness window. A replica with no advertised address has no instances row at all, so it refuses to claim rather than have its work reaped out from under it mid-run. The settle rule is stated once, in settleClaim, and every exit path calls it. A transport failure releases the claim and never completes or discards it; only a decoded reply line completes it. That line is deliberately not cluster.IsWorkerAnswer, which accepts the stream refusals a worker's tunnel writes before any request body reaches its control server: completing on those would discard work that never ran. The terminal line is persisted before the claim is completed, so a store that refuses leaves the claim standing rather than leaving the job running for ever. That is the dropped-result defect fixed structurally rather than by retry. This also surfaces a pre-existing gap rather than causing one: no worker has ever served plain task jobs, and publishing them into an empty queue group left them running with no trace. Such a claim is now failed with a reason. Removes QueueWorkers, --agent-subject and --agent-queue, and narrows an agent worker's minted JWT by agent.execute and jobs.mcp-ci.new. Assisted-by: Claude Opus 5 [claude-code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io>