diff --git a/cchat.go b/cchat.go
index efc44ee..1b74fbf 100644
--- a/cchat.go
+++ b/cchat.go
@@ -577,6 +577,13 @@ type MessagesContainer interface {
 type Messenger interface {
 	// JoinServer joins a server that's capable of receiving messages. The server
 	// may not necessarily support sending messages.
+	//
+	// Frontends must never call JoinServer on the same server more than twice
+	// without calling the stop function first. This is the best of both worlds, as
+	// it greatly reduces complexity on both sides in most cases, therefore the
+	// backend can safely assume that there will only ever be one active JoinServer.
+	// If the frontend wishes to do this, it must keep its own shared message
+	// buffer.
 	JoinServer(context.Context, MessagesContainer) (stop func(), err error)
 
 	// Asserters.
diff --git a/repository/gob/repository.gob b/repository/gob/repository.gob
index b23a751..5fe1e10 100644
Binary files a/repository/gob/repository.gob and b/repository/gob/repository.gob differ
diff --git a/repository/main.go b/repository/main.go
index 80a7d86..12285be 100644
--- a/repository/main.go
+++ b/repository/main.go
@@ -1019,6 +1019,15 @@ var Main = Packages{
 							JoinServer joins a server that's capable of
 							receiving messages. The server may not necessarily
 							support sending messages.
+
+							Frontends must never call JoinServer on the same
+							server more than twice without calling the stop
+							function first. This is the best of both worlds, as
+							it greatly reduces complexity on both sides in most
+							cases, therefore the backend can safely assume that
+							there will only ever be one active JoinServer. If
+							the frontend wishes to do this, it must keep its own
+							shared message buffer.
 						`},
 						Name: "JoinServer",
 					},