diff --git a/docs/matrix.md b/docs/matrix.md
index 67cb5f5f..f4e8420b 100644
--- a/docs/matrix.md
+++ b/docs/matrix.md
@@ -131,26 +131,15 @@ into it. This gives the operator a single Space in FluffyChat or any
 Matrix client that groups all agent-to-agent + operator rooms in one
 place.
 
-The sweep also provisions a default **`hive-chat` room** as an
-`m.space.child` of the Space. Joining a Space doesn't auto-join
-child rooms — the explicit room entry ensures the operator and every
-agent can find a common chat room without manual setup. Room join is
-restricted (any Space member including the operator can join; agents
-are explicitly invited). Room version pinned to 10 for the restricted
-join floor.
+**State**: the room ID is persisted to
+`/var/lib/hyperhive/matrix/space-room-id` (mode `0600`, root-owned).
+This path is **outside** every agent state dir and is NOT deleted by
+`nixos-container destroy --purge` — the Space survives full agent
+purges and is reused on re-provision.
 
-**State**: both room IDs are persisted to `/var/lib/hyperhive/matrix/`
-(mode `0600`, owned by the hive-c0re service user):
-- `space-room-id` — the Space itself
-- `chat-room-id` — the `hive-chat` room
-
-These paths are **outside** every agent state dir and are NOT deleted by
-`nixos-container destroy --purge` — both survive full agent purges and
-are reused on re-provision.
-
-**Idempotent**: if the files exist and are non-empty, the Space and
-room are considered already created. Delete the files to force
-re-creation (e.g. after a homeserver wipe).
+**Idempotent**: if the file exists and is non-empty, the Space is
+considered already created. Delete the file to force re-creation (e.g.
+after a homeserver wipe).
 
 ## Configuration tuning