broken but compiles and runs sans panics

code/__DEFINES/_extools.dm

@@ -1 +1,2 @@
 #define EXTOOLS (world.system_type == MS_WINDOWS ? "byond-extools.dll" : "libbyond-extools.so")
+#define AUXTOOLS (world.system_type == MS_WINDOWS ? "auxtools.dll" : "auxtools.so")

code/__DEFINES/atmospherics.dm

@@ -281,17 +281,6 @@ GLOBAL_LIST_INIT(atmos_adjacent_savings, list(0,0))
 #define CALCULATE_ADJACENT_TURFS(T) SSadjacent_air.queue[T] = 1
 #endif
 
-GLOBAL_VAR(atmos_extools_initialized) // this must be an uninitialized (null) one or init_monstermos will be called twice because reasons
-#define ATMOS_EXTOOLS_CHECK if(!GLOB.atmos_extools_initialized){\
-	GLOB.atmos_extools_initialized=TRUE;\
-	if(fexists(EXTOOLS)){\
-		var/result = call(EXTOOLS,"init_monstermos")();\
-		if(result != "ok") {CRASH(result);}\
-	} else {\
-		CRASH("[EXTOOLS] does not exist!");\
-	}\
-}
-
 //Unomos - So for whatever reason, garbage collection actually drastically decreases the cost of atmos later in the round. Turning this into a define yields massively improved performance.
 #define GAS_GARBAGE_COLLECT(GASGASGAS)\
 	var/list/CACHE_GAS = GASGASGAS;\

code/__DEFINES/subsystems.dm

@@ -126,6 +126,7 @@
 #define FIRE_PRIORITY_CHAT			400
 #define FIRE_PRIORITY_RUNECHAT		410
 #define FIRE_PRIORITY_OVERLAYS		500
+#define FIRE_PRIORITY_CALLBACKS		600
 #define FIRE_PRIORITY_INPUT			1000 // This must always always be the max highest priority. Player input must never be lost.
 
 // SS runlevels