The wire records of the fleet model service, chat memory snapshots, and usage entries: plain Java with no framework type, in the package the space names them by, so a Spring AI peer and a Micronaut LangChain4j peer serve each other's model calls, resume each other's conversations, and sum usage as one fleet. Golden CBOR vectors pin the bytes. A standalone project both agentspaces-springai and agentspaces-micronaut depend on.