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Ettore Di Giacinto
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syncstate.Config held one carrier field typed as the NATS client, so a pgbus.Bus could not be handed to a SyncedMap at all: it satisfies messaging.Broadcaster and not MessagingClient. The durable re-hydration path built for the responses map therefore had a NATS-only consumer and nothing in the build said so. The field becomes Bus messaging.Broadcaster, SubscribeJSON moves to its own file and relaxes its parameter to Broadcaster, and the four adopters fan out over PostgreSQL LISTEN/NOTIFY: fine-tune jobs, quantization jobs, agent tasks with their per-tenant children, and Open Responses metadata. A new spec proves it on a real database, over two Bus instances on two pinned listener connections: a Set and a Delete carry, a payload past the 8000-byte notification cap comes back byte identical through the spill row, two families sharing one LISTEN channel stay separate, and a terminated listener re-hydrates a row written while it was gone. The five sites that each chose a carrier for an adopter are collapsed into one DistributedServices.Broadcast() accessor. Five field reads were five chances to leave one family on NATS with nothing failing, because messaging.Client satisfies Broadcaster too. The accessor also refuses to hand out a nil pgbus.Bus wrapped in a non-nil interface, which every adopter would read as "broadcast" and dereference on the first Set. SetTaskSyncNATS and SetJobSyncNATS are renamed to SetTaskSyncBus and SetJobSyncBus so a missed wiring site fails to compile. The response metadata table gains a retention of its own, defaulting to 24 hours. It inherited the Open Responses store TTL, which defaults to 0 meaning no expiration. Zero is defensible for a map that dies with the process and is not for a table: the table grew for the life of the deployment and a restarting replica re-hydrated every response the cluster had ever created. A row that names its own expiry is still judged on that column alone, and "this row is dead" now has one SQL spelling that PurgeExpired deletes by and ListUnexpired is the negation of, so a hydrate cannot resurrect what a sweep has already retired. Assisted-by: Claude Opus 5 [claude-code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io>