{"date": "2026-10-13", "from": {"k": "unit", "s": "piece", "n": "join-visited-room > joinVisitedRoomOf() > returns `space-kind-undeclared` for a space declaring no kind, and `space-kind-mismatch` for one declaring another"}, "to": {"k": "unit", "s": "piece", "n": "join-visited-room > joinVisitedRoomOf() > returns `chat-room-missing` for an undeclared or other kind with no explicit chat declaration"}}