handles pods, double agents, shield phase-through

code/game/area/Space Station 13 areas.dm

@@ -570,6 +570,8 @@ var/list/ghostteleportlocs = list()
 	var/on_peaceful = FALSE
 	var/peace_betrayed = FALSE
 	var/detected_mech = FALSE
+	var/detected_pod = FALSE
+	var/detected_double_agent = FALSE
 	var/obj/machinery/computer/syndicate_depot/syndiecomms/comms_computer = null
 	var/obj/structure/fusionreactor/reactor
 
@@ -603,6 +605,8 @@ var/list/ghostteleportlocs = list()
 	used_self_destruct = FALSE
 	something_looted = FALSE
 	detected_mech = FALSE
+	detected_pod = FALSE
+	detected_double_agent = FALSE
 	updateicon()
 	despawn_guards()
 
@@ -645,6 +649,18 @@ var/list/ghostteleportlocs = list()
 	detected_mech = TRUE
 	increase_alert("Hostile mecha detected: [E]")
 
+/area/syndicate_depot/proc/saw_pod(obj/spacepod/P)
+	if(detected_pod)
+		return
+	detected_pod = TRUE
+	increase_alert("Hostile spacepod detected: [P]")
+
+/area/syndicate_depot/proc/saw_double_agent(mob/living/M)
+	if(detected_double_agent)
+		return
+	detected_double_agent = TRUE
+	increase_alert("Hostile double-agent detected: [M]")
+
 /area/syndicate_depot/proc/peaceful_mode(newvalue, bycomputer)
 	if(newvalue)
 		log_game("Depot visit: started")
@@ -839,6 +855,13 @@ var/list/ghostteleportlocs = list()
 			var/obj/machinery/shieldwall/syndicate/S = new /obj/machinery/shieldwall/syndicate(L.loc)
 			shield_list += S.UID()
 
+/area/syndicate_depot/proc/shields_key_check()
+	if(!shield_list.len)
+		return
+	if(detected_mech || detected_pod || detected_double_agent)
+		return
+	shields_down()
+
 /area/syndicate_depot/proc/shields_down()
 	for(var/shuid in shield_list)
 		var/obj/machinery/shieldwall/syndicate/S = locateUID(shuid)

code/modules/mob/living/simple_animal/hostile/syndicate.dm

@@ -83,6 +83,7 @@
 	var/alert_on_death = FALSE
 	var/alert_on_timeout = FALSE
 	var/alert_on_spacing = TRUE
+	var/alert_on_shield_breach = FALSE
 	var/seen_enemy = FALSE
 	var/seen_enemy_name = null
 	var/seen_revived_enemy = FALSE
@@ -103,11 +104,23 @@
 		if(!seen_enemy)
 			seen_enemy = TRUE
 			playsound(loc, 'sound/weapons/saberon.ogg', 35, 1)
-			depotarea.list_add(target, depotarea.hostile_list)
+			if(alert_on_shield_breach)
+				if(depotarea.shield_list.len)
+					raise_alert("[name] reports that an intruder is trying to breach the armory shield!")
+					alert_on_shield_breach = FALSE
+					raised_alert = FALSE
+					alert_on_death = TRUE
+			if(isliving(target))
+				var/mob/living/M = target
+				depotarea.list_add(M, depotarea.hostile_list)
+				if(M.mind && M.mind.special_role == SPECIAL_ROLE_TRAITOR)
+					depotarea.saw_double_agent(M)
 			depotarea.declare_started()
 		seen_enemy_name = target.name
 		if(istype(target, /obj/mecha))
 			depotarea.saw_mech(target)
+		if(istype(target, /obj/spacepod))
+			depotarea.saw_pod(target)
 		if(depotarea.list_includes(target, depotarea.dead_list))
 			seen_revived_enemy = TRUE
 			raise_alert("[name] reports intruder [target] has returned from death!")
@@ -153,7 +166,7 @@
 		else
 			raise_alert("[name] has died.")
 	if(shield_key && depotarea)
-		depotarea.shields_down()
+		depotarea.shields_key_check()
 	if(depotarea)
 		depotarea.list_remove(src, depotarea.guard_list)
 	return ..()
@@ -182,6 +195,7 @@
 	health = 250
 	melee_block_chance = 80
 	alert_on_timeout = TRUE
+	alert_on_shield_breach = TRUE
 
 /mob/living/simple_animal/hostile/syndicate/melee/autogib/depot/armory/death()
 	if(depotarea)