# Knowledge server

Part of the [demarkus-soul hub](/index.md). One replicated `demarkus-knowledge-server` process hosts multiple isolated worlds behind one UDP port, selected by DNS authority and TLS SNI, with GCS-backed state.

- [Multi-world Knowledge Server](/plans/knowledge-server.md): the plan; status and PR trail in its text, the tail in the [roadmap](/roadmap.md)
- [ADR 0007](/adr/0007-sni-virtual-world-routing.md): SNI selects and pins one virtual Mark server per QUIC connection
- [ADR 0008](/adr/0008-gcs-root-cas-storage.md): GCS world state commits through one root CAS
- [Bucket Document-Store Backend](/plans/bucket-store.md): the earlier bucket backend plan this design superseded