I think this is instance communication

code/modules/admin/admin_verbs.dm

@@ -139,7 +139,6 @@ GLOBAL_LIST_INIT(admin_verbs_server, list(
 	/client/proc/set_ooc,
 	/client/proc/reset_ooc,
 	/client/proc/set_next_map,
-	/client/proc/refresh_instances,
 	/client/proc/manage_queue,
 	/client/proc/add_queue_server_bypass
 	))

code/modules/admin/verbs/view_instances.dm

@@ -7,6 +7,8 @@
 		return
 
 	to_chat(usr, "<b>Server instances info</b>")
+	to_chat(usr, "<b>AA you need to finish this you lazy oaf</b>")
+	/*
 	for(var/datum/peer_server/PS in GLOB.configuration.instancing.peers)
 		// We havnt even been discovered, so we cant even be online
 		if(!PS.discovered)
@@ -20,13 +22,5 @@
 
 		// If we are here, we are online, so we can do a rich report
 		to_chat(usr, "ID [PS.server_id] - <font color='green'><b>ONLINE</b></font> (Players: [PS.playercount])")
+	*/
 
-/client/proc/refresh_instances()
-	set name = "Force Refresh Server Instances"
-	set desc = "Force refresh the local cache of server instances"
-	set category = "Server"
-
-	if(!check_rights(R_SERVER))
-		return
-
-	SSinstancing.check_peers(TRUE) // Force check

code/modules/client/client_procs.dm

@@ -326,12 +326,16 @@
 	if(length(related_accounts_cid))
 		log_admin("[key_name(src)] Alts by CID: [jointext(related_accounts_cid, " ")]")
 
+	// This sleeps so it has to go here. Dont fucking move it.
+	SSinstancing.update_playercache(ckey)
+
 	// This has to go here to avoid issues
 	// If you sleep past this point, you will get SSinput errors as well as goonchat errors
 	// DO NOT STUFF RANDOM SQL QUERIES BELOW THIS POINT WITHOUT USING `INVOKE_ASYNC()` OR SIMILAR
 	// YOU WILL BREAK STUFF. SERIOUSLY. -aa07
 	GLOB.clients += src
 
+
 	spawn() // Goonchat does some non-instant checks in start()
 		chatOutput.start()
 
@@ -434,6 +438,7 @@
 		GLOB.admins -= src
 	GLOB.directory -= ckey
 	GLOB.clients -= src
+	SSinstancing.update_playercache() // Clear us out
 	QDEL_NULL(chatOutput)
 	if(movingmob)
 		movingmob.client_mobs_in_contents -= mob

code/modules/world_topic/instance_announce.dm

@@ -3,12 +3,5 @@
 	requires_commskey = TRUE
 
 /datum/world_topic_handler/instance_announce/execute(list/input, key_valid)
-	var/msg = input["msg"]
-	if(input["repoll"]) // Repoll peers
-		UNTIL(!SSinstancing.check_running) // If we are running, wait
-		SSinstancing.check_peers(TRUE) // Manually check, with FORCE
-		UNTIL(!SSinstancing.check_running) // Wait for completion
-
-	// Now that we repolled, we can tell the playerbase
-	to_chat(world, "<center><span class='boldannounce'><big>Attention</big></span></center><hr>[msg]<hr>")
+	to_chat(world, "<center><span class='boldannounce'><big>Attention</big></span></center><hr>[input["msg"]]<hr>")
 	SEND_SOUND(world, sound('sound/misc/notice2.ogg')) // Same as captains priority announce

code/modules/world_topic/server_discovery.dm

@@ -1,12 +0,0 @@
-/datum/world_topic_handler/server_discovery
-	topic_key = "server_discovery"
-	requires_commskey = TRUE
-
-/datum/world_topic_handler/server_discovery/execute(list/input, key_valid)
-	// We need to send the stuff to make a /datum/peer_server on the other side
-	var/list/server_data = list()
-	server_data["external_ip"] = world.internet_address
-	server_data["server_id"] = GLOB.configuration.instancing.server_id
-	server_data["server_name"] = GLOB.configuration.general.server_name
-	server_data["playercount"] = length(GLOB.clients)
-	return json_encode(server_data)