diff --git a/.editorconfig b/.editorconfig
index 471170c449..954cb72e8f 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,10 +1,12 @@
+# http://editorconfig.org
+root = true
+
 [*]
 indent_style = tab
-indent_size = 4
+end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
-end_of_line = lf
 
 [*.yml]
 indent_style = space
@@ -17,4 +19,4 @@ indent_style = space
 trim_trailing_whitespace = false
 
 [Dockerfile]
-indent_style = space
+indent_style = space
\ No newline at end of file
diff --git a/.tgs.yml b/.tgs.yml
index 66dc698137..3175197c31 100644
--- a/.tgs.yml
+++ b/.tgs.yml
@@ -3,7 +3,7 @@
 version: 1
 # The BYOND version to use (kept in sync with dependencies.sh by the "TGS Test Suite" CI job)
 # Must be interpreted as a string, keep quoted
-byond: "514.1589"
+byond: "515.1634"
 # Folders to create in "<instance_path>/Configuration/GameStaticFiles/"
 static_files:
   # Config directory should be static
diff --git a/auxmos.dll b/auxmos.dll
index c465a14e53..44e011ff8d 100644
Binary files a/auxmos.dll and b/auxmos.dll differ
diff --git a/auxmos.pdb b/auxmos.pdb
index c0e3bae993..7a7f2d12cb 100644
Binary files a/auxmos.pdb and b/auxmos.pdb differ
diff --git a/code/__DEFINES/_auxtools.dm b/code/__DEFINES/_auxtools.dm
deleted file mode 100644
index fc5dfd4378..0000000000
--- a/code/__DEFINES/_auxtools.dm
+++ /dev/null
@@ -1,12 +0,0 @@
-#define AUXMOS (world.system_type == MS_WINDOWS ? "auxmos.dll" : __detect_auxmos())
-
-/proc/__detect_auxmos()
-	var/static/known_auxmos_var
-	if(!known_auxmos_var)
-		if (fexists("./libauxmos.so"))
-			known_auxmos_var = "./libauxmos.so"
-		else if (fexists("[world.GetConfig("env", "HOME")]/.byond/bin/libauxmos.so"))
-			known_auxmos_var = "[world.GetConfig("env", "HOME")]/.byond/bin/libauxmos.so"
-		else
-			CRASH("Could not find libauxmos.so")
-	return known_auxmos_var
diff --git a/code/__DEFINES/bindings.dm b/code/__DEFINES/bindings.dm
new file mode 100644
index 0000000000..f7d94e15b0
--- /dev/null
+++ b/code/__DEFINES/bindings.dm
@@ -0,0 +1,185 @@
+//THIS FILE IS AUTOMATICALLY GENERATED BY AUXMOS, PLEASE DO NOT TOUCH IT
+//PROC DEFINITIONS MAY MOVE AROUND, THIS IS NORMAL
+
+/* This comment bypasses grep checks */ /var/__auxmos
+
+/proc/__detect_auxmos()
+	if (world.system_type == UNIX)
+		return __auxmos = "libauxmos"
+	else
+		return __auxmos = "auxmos"
+
+#define AUXMOS (__auxmos || __detect_auxmos())
+
+/datum/controller/subsystem/air/proc/process_turf_equalize_auxtools(remaining)
+	return LIBCALL(AUXMOS, "byond:equalize_hook_ffi")(src, remaining)
+
+/datum/controller/subsystem/air/proc/process_excited_groups_auxtools(remaining)
+	return LIBCALL(AUXMOS, "byond:groups_hook_ffi")(src, remaining)
+
+/datum/controller/subsystem/air/proc/process_turfs_auxtools(remaining)
+	return LIBCALL(AUXMOS, "byond:process_turf_hook_ffi")(src, remaining)
+
+/datum/controller/subsystem/air/proc/finish_turf_processing_auxtools(time_remaining)
+	return LIBCALL(AUXMOS, "byond:finish_process_turfs_ffi")(time_remaining)
+
+/datum/controller/subsystem/air/proc/thread_running()
+	return LIBCALL(AUXMOS, "byond:thread_running_hook_ffi")()
+
+/turf/proc/__update_auxtools_turf_adjacency_info()
+	return LIBCALL(AUXMOS, "byond:hook_infos_ffi")(src)
+
+/turf/proc/update_air_ref(flag)
+	return LIBCALL(AUXMOS, "byond:hook_register_turf_ffi")(src, flag)
+
+/proc/finalize_gas_refs()
+	return LIBCALL(AUXMOS, "byond:finalize_gas_refs_ffi")()
+
+/datum/controller/subsystem/air/proc/auxtools_update_reactions()
+	return LIBCALL(AUXMOS, "byond:update_reactions_ffi")()
+
+/proc/auxtools_atmos_init(gas_data)
+	return LIBCALL(AUXMOS, "byond:hook_init_ffi")(gas_data)
+
+/proc/_auxtools_register_gas(gas)
+	return LIBCALL(AUXMOS, "byond:hook_register_gas_ffi")(gas)
+
+/datum/gas_mixture/proc/__auxtools_parse_gas_string(string)
+	return LIBCALL(AUXMOS, "byond:parse_gas_string_ffi")(src, string)
+
+/datum/controller/subsystem/air/proc/get_max_gas_mixes()
+	return LIBCALL(AUXMOS, "byond:hook_max_gas_mixes_ffi")()
+
+/datum/controller/subsystem/air/proc/get_amt_gas_mixes()
+	return LIBCALL(AUXMOS, "byond:hook_amt_gas_mixes_ffi")()
+
+/proc/equalize_all_gases_in_list(gas_list)
+	return LIBCALL(AUXMOS, "byond:equalize_all_hook_ffi")(gas_list)
+
+/datum/gas_mixture/proc/get_oxidation_power(temp)
+	return LIBCALL(AUXMOS, "byond:oxidation_power_hook_ffi")(src, temp)
+
+/datum/gas_mixture/proc/get_fuel_amount(temp)
+	return LIBCALL(AUXMOS, "byond:fuel_amount_hook_ffi")(src, temp)
+
+/datum/gas_mixture/proc/equalize_with(total)
+	return LIBCALL(AUXMOS, "byond:equalize_with_hook_ffi")(src, total)
+
+/datum/gas_mixture/proc/transfer_ratio_to(other, ratio)
+	return LIBCALL(AUXMOS, "byond:transfer_ratio_hook_ffi")(src, other, ratio)
+
+/datum/gas_mixture/proc/transfer_to(other, moles)
+	return LIBCALL(AUXMOS, "byond:transfer_hook_ffi")(src, other, moles)
+
+/datum/gas_mixture/proc/adjust_heat(temp)
+	return LIBCALL(AUXMOS, "byond:adjust_heat_hook_ffi")(src, temp)
+
+/datum/gas_mixture/proc/react(holder)
+	return LIBCALL(AUXMOS, "byond:react_hook_ffi")(src, holder)
+
+/datum/gas_mixture/proc/compare(other)
+	return LIBCALL(AUXMOS, "byond:compare_hook_ffi")(src, other)
+
+/datum/gas_mixture/proc/clear()
+	return LIBCALL(AUXMOS, "byond:clear_hook_ffi")(src)
+
+/datum/gas_mixture/proc/mark_immutable()
+	return LIBCALL(AUXMOS, "byond:mark_immutable_hook_ffi")(src)
+
+/datum/gas_mixture/proc/scrub_into(into, ratio_v, gas_list)
+	return LIBCALL(AUXMOS, "byond:scrub_into_hook_ffi")(src, into, ratio_v, gas_list)
+
+/datum/gas_mixture/proc/get_by_flag(flag_val)
+	return LIBCALL(AUXMOS, "byond:get_by_flag_hook_ffi")(src, flag_val)
+
+/datum/gas_mixture/proc/__remove_by_flag(into, flag_val, amount_val)
+	return LIBCALL(AUXMOS, "byond:remove_by_flag_hook_ffi")(src, into, flag_val, amount_val)
+
+/datum/gas_mixture/proc/divide(num_val)
+	return LIBCALL(AUXMOS, "byond:divide_hook_ffi")(src, num_val)
+
+/datum/gas_mixture/proc/multiply(num_val)
+	return LIBCALL(AUXMOS, "byond:multiply_hook_ffi")(src, num_val)
+
+/datum/gas_mixture/proc/subtract(num_val)
+	return LIBCALL(AUXMOS, "byond:subtract_hook_ffi")(src, num_val)
+
+/datum/gas_mixture/proc/add(num_val)
+	return LIBCALL(AUXMOS, "byond:add_hook_ffi")(src, num_val)
+
+/datum/gas_mixture/proc/adjust_multi(...)
+	var/list/args_copy = args.Copy()
+	args_copy.Insert(1, src)
+	return LIBCALL(AUXMOS, "byond:adjust_multi_hook_ffi")(arglist(args_copy))
+
+/datum/gas_mixture/proc/adjust_moles_temp(id_val, num_val, temp_val)
+	return LIBCALL(AUXMOS, "byond:adjust_moles_temp_hook_ffi")(src, id_val, num_val, temp_val)
+
+/datum/gas_mixture/proc/adjust_moles(id_val, num_val)
+	return LIBCALL(AUXMOS, "byond:adjust_moles_hook_ffi")(src, id_val, num_val)
+
+/datum/gas_mixture/proc/set_moles(gas_id, amt_val)
+	return LIBCALL(AUXMOS, "byond:set_moles_hook_ffi")(src, gas_id, amt_val)
+
+/datum/gas_mixture/proc/get_moles(gas_id)
+	return LIBCALL(AUXMOS, "byond:get_moles_hook_ffi")(src, gas_id)
+
+/datum/gas_mixture/proc/set_volume(vol_arg)
+	return LIBCALL(AUXMOS, "byond:set_volume_hook_ffi")(src, vol_arg)
+
+/datum/gas_mixture/proc/partial_heat_capacity(gas_id)
+	return LIBCALL(AUXMOS, "byond:partial_heat_capacity_ffi")(src, gas_id)
+
+/datum/gas_mixture/proc/set_temperature(arg_temp)
+	return LIBCALL(AUXMOS, "byond:set_temperature_hook_ffi")(src, arg_temp)
+
+/datum/gas_mixture/proc/get_gases()
+	return LIBCALL(AUXMOS, "byond:get_gases_hook_ffi")(src)
+
+/datum/gas_mixture/proc/temperature_share(...)
+	var/list/args_copy = args.Copy()
+	args_copy.Insert(1, src)
+	return LIBCALL(AUXMOS, "byond:temperature_share_hook_ffi")(arglist(args_copy))
+
+/datum/gas_mixture/proc/copy_from(giver)
+	return LIBCALL(AUXMOS, "byond:copy_from_hook_ffi")(src, giver)
+
+/datum/gas_mixture/proc/__remove(into, amount_arg)
+	return LIBCALL(AUXMOS, "byond:remove_hook_ffi")(src, into, amount_arg)
+
+/datum/gas_mixture/proc/__remove_ratio(into, ratio_arg)
+	return LIBCALL(AUXMOS, "byond:remove_ratio_hook_ffi")(src, into, ratio_arg)
+
+/datum/gas_mixture/proc/merge(giver)
+	return LIBCALL(AUXMOS, "byond:merge_hook_ffi")(src, giver)
+
+/datum/gas_mixture/proc/thermal_energy()
+	return LIBCALL(AUXMOS, "byond:thermal_energy_hook_ffi")(src)
+
+/datum/gas_mixture/proc/return_volume()
+	return LIBCALL(AUXMOS, "byond:return_volume_hook_ffi")(src)
+
+/datum/gas_mixture/proc/return_temperature()
+	return LIBCALL(AUXMOS, "byond:return_temperature_hook_ffi")(src)
+
+/datum/gas_mixture/proc/return_pressure()
+	return LIBCALL(AUXMOS, "byond:return_pressure_hook_ffi")(src)
+
+/datum/gas_mixture/proc/total_moles()
+	return LIBCALL(AUXMOS, "byond:total_moles_hook_ffi")(src)
+
+/datum/gas_mixture/proc/set_min_heat_capacity(arg_min)
+	return LIBCALL(AUXMOS, "byond:min_heat_cap_hook_ffi")(src, arg_min)
+
+/datum/gas_mixture/proc/heat_capacity()
+	return LIBCALL(AUXMOS, "byond:heat_cap_hook_ffi")(src)
+
+/datum/gas_mixture/proc/__gasmixture_unregister()
+	return LIBCALL(AUXMOS, "byond:unregister_gasmixture_hook_ffi")(src)
+
+/datum/gas_mixture/proc/__gasmixture_register()
+	return LIBCALL(AUXMOS, "byond:register_gasmixture_hook_ffi")(src)
+
+/proc/process_atmos_callbacks(remaining)
+	return LIBCALL(AUXMOS, "byond:atmos_callback_handle_ffi")(remaining)
+
diff --git a/code/__DEFINES/spaceman_dmm.dm b/code/__DEFINES/spaceman_dmm.dm
index f15d6a175f..cabb02fd49 100644
--- a/code/__DEFINES/spaceman_dmm.dm
+++ b/code/__DEFINES/spaceman_dmm.dm
@@ -3,30 +3,72 @@
 
 // The SPACEMAN_DMM define is set by the linter and other tooling when it runs.
 #ifdef SPACEMAN_DMM
+	/**
+	 * Sets a return type expression for a proc. The return type can take the forms:
+
+	 * `/typepath` - a raw typepath. The return type of the proc is the type named.
+
+	 * `param` - a typepath given as a parameter, for procs which return an instance of the passed-in type.
+
+	 * `param.type` - the static type of a passed-in parameter, for procs which
+	 * return their input or otherwise another value of the same type.
+
+	 * `param[_].type` - the static type of a passed-in parameter, with one level
+	 * of `/list` stripped, for procs which select one item from a list. The `[_]`
+	 * may be repeated to strip more levels of `/list`.
+	 */
 	#define RETURN_TYPE(X) set SpacemanDMM_return_type = X
+	/**
+	 * If set, will enable a diagnostic on children of the proc it is set on which do
+	 * not contain any `..()` parent calls. This can help with finding situations
+	 * where a signal or other important handling in the parent proc is being skipped.
+	 * Child procs may set this setting to `0` instead to override the check.
+	 */
 	#define SHOULD_CALL_PARENT(X) set SpacemanDMM_should_call_parent = X
-	#define UNLINT(X) SpacemanDMM_unlint(X)
+	/**
+	 * If set, raise a warning for any child procs that override this one,
+	 * regardless of if it calls parent or not.
+	 * This functions in a similar way to the `final` keyword in some languages.
+	 * This cannot be disabled by child overrides.
+	 */
 	#define SHOULD_NOT_OVERRIDE(X) set SpacemanDMM_should_not_override = X
+	/**
+	 * If set, raise a warning if the proc or one of the sub-procs it calls
+	 * uses a blocking call, such as `sleep()` or `input()` without using `set waitfor = 0`
+	 * This cannot be disabled by child overrides.
+	 */
 	#define SHOULD_NOT_SLEEP(X) set SpacemanDMM_should_not_sleep = X
+	/**
+	 * If set, ensure a proc is 'pure', such that it does not make any changes
+	 * outside itself or output. This also checks to make sure anything using
+	 * this proc doesn't invoke it without making use of the return value.
+	 * This cannot be disabled by child overrides.
+	 */
 	#define SHOULD_BE_PURE(X) set SpacemanDMM_should_be_pure = X
+	///Private procs can only be called by things of exactly the same type.
 	#define PRIVATE_PROC(X) set SpacemanDMM_private_proc = X
+	///Protected procs can only be call by things of the same type *or subtypes*.
 	#define PROTECTED_PROC(X) set SpacemanDMM_protected_proc = X
+	///If set, will not lint.
+	#define UNLINT(X) SpacemanDMM_unlint(X)
+
+	///If set, overriding their value isn't permitted by types that inherit it.
 	#define VAR_FINAL var/SpacemanDMM_final
+	///Private vars can only be called by things of exactly the same type.
 	#define VAR_PRIVATE var/SpacemanDMM_private
+	///Protected vars can only be called by things of the same type *or subtypes*.
 	#define VAR_PROTECTED var/SpacemanDMM_protected
 #else
 	#define RETURN_TYPE(X)
 	#define SHOULD_CALL_PARENT(X)
-	#define UNLINT(X) X
 	#define SHOULD_NOT_OVERRIDE(X)
 	#define SHOULD_NOT_SLEEP(X)
 	#define SHOULD_BE_PURE(X)
 	#define PRIVATE_PROC(X)
 	#define PROTECTED_PROC(X)
+	#define UNLINT(X) X
+
 	#define VAR_FINAL var
 	#define VAR_PRIVATE var
 	#define VAR_PROTECTED var
 #endif
-
-/proc/enable_debugging()
-    CRASH("Auxtools not found")
diff --git a/code/__HELPERS/_auxtools_api.dm b/code/__HELPERS/_auxtools_api.dm
new file mode 100644
index 0000000000..8dbd58f2ee
--- /dev/null
+++ b/code/__HELPERS/_auxtools_api.dm
@@ -0,0 +1,43 @@
+#define AUXTOOLS_FULL_INIT 2
+#define AUXTOOLS_PARTIAL_INIT 1
+
+GLOBAL_LIST_EMPTY(auxtools_initialized)
+GLOBAL_PROTECT(auxtools_initialized)
+
+#define AUXTOOLS_CHECK(LIB)\
+	if (!CONFIG_GET(flag/auxtools_enabled)) {\
+		CRASH("Auxtools is not enabled in config!");\
+	}\
+	if (GLOB.auxtools_initialized[LIB] != AUXTOOLS_FULL_INIT) {\
+		if (fexists(LIB)) {\
+			var/string = LIBCALL(LIB,"auxtools_init")();\
+			if(findtext(string, "SUCCESS")) {\
+				GLOB.auxtools_initialized[LIB] = AUXTOOLS_FULL_INIT;\
+			} else {\
+				CRASH(string);\
+			}\
+		} else {\
+			CRASH("No file named [LIB] found!")\
+		}\
+	}\
+
+#define AUXTOOLS_SHUTDOWN(LIB)\
+	if (GLOB.auxtools_initialized[LIB] == AUXTOOLS_FULL_INIT && fexists(LIB)){\
+		LIBCALL(LIB,"auxtools_shutdown")();\
+		GLOB.auxtools_initialized[LIB] = AUXTOOLS_PARTIAL_INIT;\
+	}\
+
+#define AUXTOOLS_FULL_SHUTDOWN(LIB)\
+	if (GLOB.auxtools_initialized[LIB] && fexists(LIB)){\
+		LIBCALL(LIB,"auxtools_full_shutdown")();\
+		GLOB.auxtools_initialized[LIB] = FALSE;\
+	}
+
+/proc/auxtools_stack_trace(msg)
+	CRASH(msg)
+
+/proc/auxtools_expr_stub()
+	CRASH("auxtools not loaded")
+
+/proc/enable_debugging(mode, port)
+	CRASH("auxtools not loaded")
diff --git a/code/__HELPERS/_extools_api.dm b/code/__HELPERS/_extools_api.dm
deleted file mode 100644
index 18866d571a..0000000000
--- a/code/__HELPERS/_extools_api.dm
+++ /dev/null
@@ -1,31 +0,0 @@
-//#define EXTOOLS_LOGGING // rust_g is used as a fallback if this is undefined
-
-/proc/extools_log_write()
-
-/proc/extools_finalize_logging()
-
-/proc/auxtools_stack_trace(msg)
-	CRASH(msg)
-
-//glob doesn't exist yet at some gas new calls, imma use it anyways
-GLOBAL_REAL_VAR(list/__auxtools_initialized) = list()
-
-#define AUXTOOLS_CHECK(LIB)\
-	if (!__auxtools_initialized[LIB]) {\
-		if (fexists(LIB)) {\
-			var/string = LIBCALL(LIB,"auxtools_init")();\
-			if(findtext(string, "SUCCESS")) {\
-				__auxtools_initialized[LIB] = TRUE;\
-			} else {\
-				CRASH(string);\
-			}\
-		} else {\
-			CRASH("No file named [LIB] found!")\
-		}\
-	}\
-
-#define AUXTOOLS_SHUTDOWN(LIB)\
-	if (__auxtools_initialized[LIB] && fexists(LIB)){\
-		LIBCALL(LIB,"auxtools_shutdown")();\
-		__auxtools_initialized[LIB] = FALSE;\
-	}\
diff --git a/code/__byond_version_compat.dm b/code/__byond_version_compat.dm
index ff1a1a1d97..43307b5ce1 100644
--- a/code/__byond_version_compat.dm
+++ b/code/__byond_version_compat.dm
@@ -1,12 +1,12 @@
 // This file contains defines allowing targeting byond versions newer than the supported
 
 //Update this whenever you need to take advantage of more recent byond features
-#define MIN_COMPILER_VERSION 514
-#define MIN_COMPILER_BUILD 1556
+#define MIN_COMPILER_VERSION 515
+#define MIN_COMPILER_BUILD 1634
 #if (DM_VERSION < MIN_COMPILER_VERSION || DM_BUILD < MIN_COMPILER_BUILD) && !defined(SPACEMAN_DMM)
 //Don't forget to update this part
 #error Your version of BYOND is too out-of-date to compile this project. Go to https://secure.byond.com/download and update.
-#error You need version 514.1556 or higher
+#error You need version 515.1634 or higher
 #endif
 
 #if (DM_VERSION == 514 && DM_BUILD > 1575 && DM_BUILD <= 1577)
diff --git a/code/controllers/master.dm b/code/controllers/master.dm
index 715d5eab28..de94b27e77 100644
--- a/code/controllers/master.dm
+++ b/code/controllers/master.dm
@@ -309,7 +309,7 @@ GLOBAL_REAL(Master, /datum/controller/master) = new
 	//(higher subsystems will be sooner in the queue, adding them later in the loop means we don't have to loop thru them next queue add)
 	sortTim(tickersubsystems, GLOBAL_PROC_REF(cmp_subsystem_priority))
 	for(var/I in runlevel_sorted_subsystems)
-		sortTim(runlevel_sorted_subsystems, GLOBAL_PROC_REF(cmp_subsystem_priority))
+		sortTim(I, GLOBAL_PROC_REF(cmp_subsystem_priority))
 		I += tickersubsystems
 
 	var/cached_runlevel = current_runlevel
diff --git a/code/controllers/subsystem/air.dm b/code/controllers/subsystem/air.dm
index 26a51ec2c1..035f5e7453 100644
--- a/code/controllers/subsystem/air.dm
+++ b/code/controllers/subsystem/air.dm
@@ -6,6 +6,8 @@ SUBSYSTEM_DEF(air)
 	flags = SS_BACKGROUND
 	runlevels = RUNLEVEL_GAME | RUNLEVEL_POSTGAME
 
+	var/cached_cost = 0
+
 	var/cost_turfs = 0
 	var/cost_groups = 0
 	var/cost_highpressure = 0
@@ -26,6 +28,9 @@ SUBSYSTEM_DEF(air)
 	var/num_group_turfs_processed = 0
 	var/num_equalize_processed = 0
 
+	var/gas_mixes_count = 0
+	var/gas_mixes_allocated = 0
+
 	var/list/hotspots = list()
 	var/list/networks = list()
 	var/list/pipenets_needing_rebuilt = list()
@@ -53,8 +58,6 @@ SUBSYSTEM_DEF(air)
 	var/equalize_hard_turf_limit = 2000
 	// Whether equalization is enabled. Can be disabled for performance reasons.
 	var/equalize_enabled = FALSE
-	// When above 0, won't equalize; performance handling
-	var/eq_cooldown = 0
 	// Whether turf-to-turf heat exchanging should be enabled.
 	var/heat_enabled = FALSE
 	// Max number of times process_turfs will share in a tick.
@@ -65,8 +68,6 @@ SUBSYSTEM_DEF(air)
 	var/excited_group_pressure_goal = 1
 	// Target for excited_group_pressure_goal; can go below this, if it determines the thread is taking too long.
 	var/excited_group_pressure_goal_target = 1
-	// If this is set to 0, monstermos won't process planet atmos
-	var/planet_equalize_enabled = 0
 
 /datum/controller/subsystem/air/stat_entry(msg)
 	msg += "C:{"
@@ -91,8 +92,8 @@ SUBSYSTEM_DEF(air)
 	msg += "LT:[low_pressure_turfs]|"
 	msg += "ET:[num_equalize_processed]|"
 	msg += "GT:[num_group_turfs_processed]|"
-	msg += "GA:[get_amt_gas_mixes()]|"
-	msg += "MG:[get_max_gas_mixes()]"
+	msg += "GA:[gas_mixes_count]|"
+	msg += "MG:[gas_mixes_allocated]"
 	return ..()
 
 /datum/controller/subsystem/air/Initialize(timeofday)
@@ -107,7 +108,6 @@ SUBSYSTEM_DEF(air)
 
 /datum/controller/subsystem/air/proc/extools_update_ssair()
 
-/datum/controller/subsystem/air/proc/auxtools_update_reactions()
 
 /datum/controller/subsystem/air/proc/add_reaction(datum/gas_reaction/r)
 	gas_reactions += r
@@ -123,9 +123,6 @@ SUBSYSTEM_DEF(air)
 	message_admins("Air reset done.")
 	SSair.can_fire = 1
 
-/datum/controller/subsystem/air/proc/thread_running()
-	return FALSE
-
 /proc/fix_corrupted_atmos()
 
 /datum/admins/proc/fixcorruption()
@@ -137,6 +134,12 @@ SUBSYSTEM_DEF(air)
 /datum/controller/subsystem/air/fire(resumed = 0)
 	var/timer = TICK_USAGE_REAL
 
+	thread_wait_ticks = MC_AVERAGE(thread_wait_ticks, cur_thread_wait_ticks)
+	cur_thread_wait_ticks = 0
+
+	gas_mixes_count = get_amt_gas_mixes()
+	gas_mixes_allocated = get_max_gas_mixes()
+
 	if(currentpart == SSAIR_REBUILD_PIPENETS)
 		timer = TICK_USAGE_REAL
 		var/list/pipenet_rebuilds = pipenets_needing_rebuilt
@@ -150,6 +153,30 @@ SUBSYSTEM_DEF(air)
 		if(state != SS_RUNNING)
 			return
 		resumed = FALSE
+		currentpart = SSAIR_PIPENETS
+
+	if(currentpart == SSAIR_PIPENETS || !resumed)
+		timer = TICK_USAGE_REAL
+		if(!resumed)
+			cached_cost = 0
+		process_pipenets(resumed)
+		cached_cost += TICK_USAGE_REAL - timer
+		if(state != SS_RUNNING)
+			return
+		cost_pipenets = MC_AVERAGE(cost_pipenets, TICK_DELTA_TO_MS(cached_cost))
+		resumed = 0
+		currentpart = SSAIR_ATMOSMACHINERY
+
+	if(currentpart == SSAIR_ATMOSMACHINERY)
+		timer = TICK_USAGE_REAL
+		if(!resumed)
+			cached_cost = 0
+		process_atmos_machinery(resumed)
+		cached_cost += TICK_USAGE_REAL - timer
+		if(state != SS_RUNNING)
+			return
+		resumed = 0
+		cost_atmos_machinery = MC_AVERAGE(cost_atmos_machinery, TICK_DELTA_TO_MS(cached_cost))
 		currentpart = SSAIR_ACTIVETURFS
 
 	if(currentpart == SSAIR_ACTIVETURFS)
@@ -158,6 +185,13 @@ SUBSYSTEM_DEF(air)
 		if(state != SS_RUNNING)
 			return
 		resumed = 0
+		currentpart = equalize_enabled ? SSAIR_EQUALIZE : SSAIR_EXCITEDGROUPS
+
+	if(currentpart == SSAIR_EQUALIZE)
+		process_turf_equalize(resumed)
+		if(state != SS_RUNNING)
+			return
+		resumed = 0
 		currentpart = SSAIR_EXCITEDGROUPS
 
 	if(currentpart == SSAIR_EXCITEDGROUPS)
@@ -165,34 +199,10 @@ SUBSYSTEM_DEF(air)
 		if(state != SS_RUNNING)
 			return
 		resumed = 0
-		currentpart = equalize_enabled ? SSAIR_EQUALIZE : SSAIR_FINALIZE_TURFS
-
-	if(currentpart == SSAIR_EQUALIZE)
-		equalize_turfs(resumed)
-		if(state != SS_RUNNING)
-			return
-		resumed = 0
 		currentpart = SSAIR_FINALIZE_TURFS
 
 	if(currentpart == SSAIR_FINALIZE_TURFS)
 		finish_turf_processing(resumed)
-		if(state != SS_RUNNING)
-			return
-		resumed = FALSE
-		currentpart = SSAIR_PIPENETS
-
-	if(currentpart == SSAIR_PIPENETS || !resumed)
-		timer = TICK_USAGE_REAL
-		process_pipenets(resumed)
-		cost_pipenets = MC_AVERAGE(cost_pipenets, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
-		if(state != SS_RUNNING)
-			return
-		resumed = 0
-		currentpart = SSAIR_ATMOSMACHINERY
-	if(currentpart == SSAIR_ATMOSMACHINERY)
-		timer = TICK_USAGE_REAL
-		process_atmos_machinery(resumed)
-		cost_atmos_machinery = MC_AVERAGE(cost_atmos_machinery, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
 		if(state != SS_RUNNING)
 			return
 		resumed = 0
@@ -200,21 +210,28 @@ SUBSYSTEM_DEF(air)
 
 	if(currentpart == SSAIR_HIGHPRESSURE)
 		timer = TICK_USAGE_REAL
+		if(!resumed)
+			cached_cost = 0
 		process_high_pressure_delta(resumed)
-		cost_highpressure = MC_AVERAGE(cost_highpressure, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
+		cached_cost += TICK_USAGE_REAL - timer
 		if(state != SS_RUNNING)
 			return
+		cost_highpressure = MC_AVERAGE(cost_highpressure, TICK_DELTA_TO_MS(cached_cost))
 		resumed = 0
 		currentpart = SSAIR_HOTSPOTS
 
 	if(currentpart == SSAIR_HOTSPOTS)
 		timer = TICK_USAGE_REAL
+		if(!resumed)
+			cached_cost = 0
 		process_hotspots(resumed)
-		cost_hotspots = MC_AVERAGE(cost_hotspots, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
+		cached_cost += TICK_USAGE_REAL - timer
 		if(state != SS_RUNNING)
 			return
+		cost_hotspots = MC_AVERAGE(cost_hotspots, TICK_DELTA_TO_MS(cached_cost))
 		resumed = 0
 		currentpart = heat_enabled ? SSAIR_TURF_CONDUCTION : SSAIR_REBUILD_PIPENETS
+
 	// Heat -- slow and of questionable usefulness. Off by default for this reason. Pretty cool, though.
 	if(currentpart == SSAIR_TURF_CONDUCTION)
 		timer = TICK_USAGE_REAL
@@ -309,14 +326,8 @@ SUBSYSTEM_DEF(air)
 	if(post_process_turfs_auxtools(TICK_REMAINING_MS))
 		pause()
 
-/datum/controller/subsystem/air/proc/finish_turf_processing_auxtools()
 /datum/controller/subsystem/air/proc/equalize_turfs_auxtools()
-/datum/controller/subsystem/air/proc/process_turfs_auxtools()
 /datum/controller/subsystem/air/proc/post_process_turfs_auxtools()
-/datum/controller/subsystem/air/proc/process_turf_equalize_auxtools()
-/datum/controller/subsystem/air/proc/process_excited_groups_auxtools()
-/datum/controller/subsystem/air/proc/get_amt_gas_mixes()
-/datum/controller/subsystem/air/proc/get_max_gas_mixes()
 /datum/controller/subsystem/air/proc/turf_process_time()
 /datum/controller/subsystem/air/proc/heat_process_time()
 /datum/controller/subsystem/air/proc/process_turf_heat()
@@ -392,6 +403,19 @@ SUBSYSTEM_DEF(air)
 	var/datum/atmosphere/mix = atmos_gen[gas_string]
 	return mix.gas_string
 
+/datum/controller/subsystem/air/proc/start_processing_machine(obj/machinery/machine)
+	if(machine.atmos_processing)
+		return
+	machine.atmos_processing = TRUE
+	atmos_machinery += machine
+
+/datum/controller/subsystem/air/proc/stop_processing_machine(obj/machinery/machine)
+	if(!machine.atmos_processing)
+		return
+	machine.atmos_processing = FALSE
+	atmos_machinery -= machine
+	currentrun -= machine
+
 #undef SSAIR_PIPENETS
 #undef SSAIR_ATMOSMACHINERY
 #undef SSAIR_EXCITEDGROUPS
diff --git a/code/controllers/subsystem/callback.dm b/code/controllers/subsystem/callback.dm
index 21c43f3e6c..dc33f6f3c8 100644
--- a/code/controllers/subsystem/callback.dm
+++ b/code/controllers/subsystem/callback.dm
@@ -4,11 +4,6 @@ SUBSYSTEM_DEF(callbacks)
 	wait = 1
 	priority = FIRE_PRIORITY_CALLBACKS
 
-/proc/process_atmos_callbacks()
-	SScallbacks.can_fire = 0
-	SScallbacks.flags |= SS_NO_FIRE
-	CRASH("Auxtools not found! Callback subsystem shutting itself off.")
-
 /datum/controller/subsystem/callbacks/fire()
 	if(process_atmos_callbacks(TICK_REMAINING_MS))
 		pause()
diff --git a/code/datums/callback.dm b/code/datums/callback.dm
index f1cf30855f..ad8a50b1c1 100644
--- a/code/datums/callback.dm
+++ b/code/datums/callback.dm
@@ -5,10 +5,10 @@
  * ## USAGE
  *
  * ```
- * var/datum/callback/C = new(object|null, /proc/type/path|"procstring", arg1, arg2, ... argn)
+ * var/datum/callback/C = new(object|null, PROC_REF(procname), arg1, arg2, ... argn)
  * var/timerid = addtimer(C, time, timertype)
  * you can also use the compiler define shorthand
- * var/timerid = addtimer(CALLBACK(object|null, PROC_REF(type/path|procstring), arg1, arg2, ... argn), time, timertype)
+ * var/timerid = addtimer(CALLBACK(object|null, PROC_REF(procname), arg1, arg2, ... argn), time, timertype)
  * ```
  *
  * Note: proc strings can only be given for datum proc calls, global procs must be proc paths
@@ -26,27 +26,19 @@
  * ## PROC TYPEPATH SHORTCUTS
  * (these operate on paths, not types, so to these shortcuts, datum is NOT a parent of atom, etc...)
  *
- * ### global proc while in another global proc:
- * .procname
- *
- * `CALLBACK(GLOBAL_PROC, .some_proc_here)`
- *
- * ### proc defined on current(src) object (when in a /proc/ and not an override) OR overridden at src or any of it's parents:
- * .procname
- *
- * `CALLBACK(src, .some_proc_here)`
- *
- * ### when the above doesn't apply:
- *PROC_REF(procname)
+ * ### proc defined on current(src) object OR overridden at src or any of it's parents:
+ * PROC_REF(procname)
  *
  * `CALLBACK(src, PROC_REF(some_proc_here))`
  *
+ * ### global proc
+ * GLOBAL_PROC_REF(procname)
  *
- * proc defined on a parent of a some type
+ * `CALLBACK(src, GLOBAL_PROC_REF(some_proc_here))`
  *
- * `TYPE_PROC_REF(/some/type, some_proc_here)`
  *
- * Otherwise you must always provide the full typepath of the proc (/type/of/thing/proc/procname)
+ * ### proc defined on some type
+ * TYPE_PROC_REF(/some/type, some_proc_here)
  */
 /datum/callback
 
diff --git a/code/game/machinery/_machinery.dm b/code/game/machinery/_machinery.dm
index d01889f9fc..035f18f2d4 100644
--- a/code/game/machinery/_machinery.dm
+++ b/code/game/machinery/_machinery.dm
@@ -139,6 +139,9 @@ Class Procs:
 	var/market_verb = "Customer"
 	var/payment_department = ACCOUNT_ENG
 
+	///Boolean on whether this machines interact with atmos
+	var/atmos_processing = FALSE
+
 /obj/machinery/Initialize(mapload)
 	if(!armor)
 		armor = list(MELEE = 25, BULLET = 10, LASER = 10, ENERGY = 0, BOMB = 0, BIO = 0, RAD = 0, FIRE = 50, ACID = 70)
diff --git a/code/game/machinery/computer/atmos_control.dm b/code/game/machinery/computer/atmos_control.dm
index c8add9e690..81c3ad8118 100644
--- a/code/game/machinery/computer/atmos_control.dm
+++ b/code/game/machinery/computer/atmos_control.dm
@@ -73,11 +73,11 @@
 
 /obj/machinery/air_sensor/Initialize(mapload)
 	. = ..()
-	SSair.atmos_machinery += src
+	SSair.start_processing_machine(src)
 	set_frequency(frequency)
 
 /obj/machinery/air_sensor/Destroy()
-	SSair.atmos_machinery -= src
+	SSair.stop_processing_machine(src)
 	SSradio.remove_object(src, frequency)
 	return ..()
 
diff --git a/code/game/machinery/spaceheater.dm b/code/game/machinery/spaceheater.dm
index 93b85bb45b..d90f4f8bc9 100644
--- a/code/game/machinery/spaceheater.dm
+++ b/code/game/machinery/spaceheater.dm
@@ -222,7 +222,7 @@
 			usr.visible_message("<span class='notice'>[usr] switches [on ? "on" : "off"] \the [src].</span>", "<span class='notice'>You switch [on ? "on" : "off"] \the [src].</span>")
 			update_icon()
 			if (on)
-				SSair.atmos_machinery += src
+				SSair.start_processing_machine(src)
 			. = TRUE
 		if("mode")
 			setMode = params["mode"]
diff --git a/code/game/turfs/change_turf.dm b/code/game/turfs/change_turf.dm
index 7502d4b2f0..9814765ecf 100644
--- a/code/game/turfs/change_turf.dm
+++ b/code/game/turfs/change_turf.dm
@@ -142,6 +142,9 @@ GLOBAL_LIST_INIT(blacklisted_automated_baseturfs, typecacheof(list(
 	return W
 
 /turf/open/ChangeTurf(path, list/new_baseturfs, flags)
+	//don't
+	if(!SSair.initialized)
+		return ..()
 	if ((flags & CHANGETURF_INHERIT_AIR) && ispath(path, /turf/open))
 		var/datum/gas_mixture/stashed_air = new()
 		stashed_air.copy_from(air)
diff --git a/code/game/world.dm b/code/game/world.dm
index eeb8b33f01..c6a5a2ef95 100644
--- a/code/game/world.dm
+++ b/code/game/world.dm
@@ -9,14 +9,11 @@ GLOBAL_LIST(topic_status_cache)
 //So subsystems globals exist, but are not initialised
 
 /world/New()
-	var/debug_server = world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
-	if (debug_server)
-		call(debug_server, "auxtools_init")()
+	var/dll = GetConfig("env", "AUXTOOLS_DEBUG_DLL")
+	if (dll)
+		LIBCALL(dll, "auxtools_init")()
 		enable_debugging()
-	AUXTOOLS_CHECK(AUXMOS)
-#ifdef EXTOOLS_REFERENCE_TRACKING
-	enable_reference_tracking()
-#endif
+
 	world.Profile(PROFILE_START)
 	log_world("World loaded at [TIME_STAMP("hh:mm:ss", FALSE)]!")
 
@@ -270,19 +267,23 @@ GLOBAL_LIST(topic_status_cache)
 		if(do_hard_reboot)
 			log_world("World hard rebooted at [TIME_STAMP("hh:mm:ss", FALSE)]")
 			shutdown_logging() // See comment below.
+			var/debug_server = world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
+			if (debug_server)
+				LIBCALL(debug_server, "auxtools_shutdown")()
 			TgsEndProcess()
 
 	log_world("World rebooted at [TIME_STAMP("hh:mm:ss", FALSE)]")
 	shutdown_logging() // Past this point, no logging procs can be used, at risk of data loss.
-	AUXTOOLS_SHUTDOWN(AUXMOS)
+	var/debug_server = world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
+	if (debug_server)
+		LIBCALL(debug_server, "auxtools_shutdown")()
 	..()
 
 /world/Del()
 	shutdown_logging() // makes sure the thread is closed before end, else we terminate
-	AUXTOOLS_SHUTDOWN(AUXMOS)
 	var/debug_server = world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
 	if (debug_server)
-		call(debug_server, "auxtools_shutdown")()
+		LIBCALL(debug_server, "auxtools_shutdown")()
 	..()
 
 /world/proc/update_status()
diff --git a/code/modules/atmospherics/environmental/LINDA_system.dm b/code/modules/atmospherics/environmental/LINDA_system.dm
index 83eb5d8ef3..aa3d49e3b7 100644
--- a/code/modules/atmospherics/environmental/LINDA_system.dm
+++ b/code/modules/atmospherics/environmental/LINDA_system.dm
@@ -71,8 +71,6 @@
 
 /turf/proc/set_sleeping(should_sleep)
 
-/turf/proc/__update_auxtools_turf_adjacency_info()
-
 //returns a list of adjacent turfs that can share air with this one.
 //alldir includes adjacent diagonal tiles that can share
 //	air with both of the related adjacent cardinal tiles
diff --git a/code/modules/atmospherics/environmental/LINDA_turf_tile.dm b/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
index 123f5936f4..c527d0d416 100644
--- a/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
+++ b/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
@@ -45,9 +45,6 @@
 		QDEL_NULL(active_hotspot)
 	return ..()
 
-/// Function for Extools Atmos
-/turf/proc/update_air_ref()
-
 /////////////////GAS MIXTURE PROCS///////////////////
 
 /turf/open/assume_air(datum/gas_mixture/giver) //use this for machines to adjust air
diff --git a/code/modules/atmospherics/gasmixtures/auxgm.dm b/code/modules/atmospherics/gasmixtures/auxgm.dm
index 0c36457ea2..0318e06abe 100644
--- a/code/modules/atmospherics/gasmixtures/auxgm.dm
+++ b/code/modules/atmospherics/gasmixtures/auxgm.dm
@@ -12,8 +12,6 @@ GLOBAL_LIST_INIT(nonreactive_gases, typecacheof(list(GAS_O2, GAS_N2, GAS_CO2, GA
 
 // Also allows you to add new gases at runtime
 
-/proc/_auxtools_register_gas(datum/gas/gas) // makes sure auxtools knows stuff about this gas
-
 /datum/auxgm
 	var/done_initializing = FALSE
 	var/list/datums = list()
@@ -148,8 +146,6 @@ GLOBAL_LIST_INIT(nonreactive_gases, typecacheof(list(GAS_O2, GAS_N2, GAS_CO2, GA
 			SSair.auxtools_update_reactions()
 		SEND_GLOBAL_SIGNAL(COMSIG_GLOB_NEW_GAS, g)
 
-/proc/finalize_gas_refs()
-
 /datum/auxgm/New()
 	src.supermatter[HEAT_PENALTY] = list()
 	src.supermatter[TRANSMIT_MODIFIER] = list()
diff --git a/code/modules/atmospherics/gasmixtures/gas_mixture.dm b/code/modules/atmospherics/gasmixtures/gas_mixture.dm
index 8b00fc49d0..34487da244 100644
--- a/code/modules/atmospherics/gasmixtures/gas_mixture.dm
+++ b/code/modules/atmospherics/gasmixtures/gas_mixture.dm
@@ -16,13 +16,10 @@ What are the archived variables for?
 
 GLOBAL_LIST_INIT(auxtools_atmos_initialized,FALSE)
 
-/proc/auxtools_atmos_init()
-
 /datum/gas_mixture/New(volume)
 	if (!isnull(volume))
 		initial_volume = volume
-	AUXTOOLS_CHECK(AUXMOS)
-	if(!GLOB.auxtools_atmos_initialized && auxtools_atmos_init())
+	if(!GLOB.auxtools_atmos_initialized && auxtools_atmos_init(GLOB.gas_data))
 		GLOB.auxtools_atmos_initialized = TRUE
 	__gasmixture_register()
 	reaction_results = new
@@ -111,9 +108,6 @@ we use a hook instead
 	. = ..()
 	*/
 
-/datum/gas_mixture/proc/__gasmixture_unregister()
-/datum/gas_mixture/proc/__gasmixture_register()
-
 /proc/gas_types()
 	var/list/L = subtypesof(/datum/gas)
 	for(var/gt in L)
@@ -121,22 +115,6 @@ we use a hook instead
 		L[gt] = initial(G.specific_heat)
 	return L
 
-/datum/gas_mixture/proc/heat_capacity() //joules per kelvin
-
-/datum/gas_mixture/proc/partial_heat_capacity(gas_type)
-
-/datum/gas_mixture/proc/total_moles()
-
-/datum/gas_mixture/proc/return_pressure() //kilopascals
-
-/datum/gas_mixture/proc/return_temperature() //kelvins
-
-/datum/gas_mixture/proc/set_min_heat_capacity(n)
-/datum/gas_mixture/proc/set_temperature(new_temp)
-/datum/gas_mixture/proc/set_volume(new_volume)
-/datum/gas_mixture/proc/get_moles(gas_type)
-/datum/gas_mixture/proc/get_by_flag(flag)
-/datum/gas_mixture/proc/set_moles(gas_type, moles)
 
 // VV WRAPPERS - EXTOOLS HOOKED PROCS DO NOT TAKE ARGUMENTS FROM CALL() FOR SOME REASON.
 /datum/gas_mixture/proc/vv_set_moles(gas_type, moles)
@@ -150,34 +128,12 @@ we use a hook instead
 /datum/gas_mixture/proc/vv_react(datum/holder)
 	return react(holder)
 
-/datum/gas_mixture/proc/scrub_into(datum/gas_mixture/target, ratio, list/gases)
-/datum/gas_mixture/proc/mark_immutable()
-/datum/gas_mixture/proc/get_gases()
-/datum/gas_mixture/proc/add(amt)
-/datum/gas_mixture/proc/subtract(amt)
-/datum/gas_mixture/proc/multiply(factor)
-/datum/gas_mixture/proc/divide(factor)
 /datum/gas_mixture/proc/get_last_share()
-/datum/gas_mixture/proc/clear()
-
-/datum/gas_mixture/proc/adjust_moles(gas_type, amt = 0)
-	set_moles(gas_type, clamp(get_moles(gas_type) + amt,0,INFINITY))
-
-/datum/gas_mixture/proc/adjust_moles_temp(gas_type, amt, temperature)
-
-/datum/gas_mixture/proc/adjust_multi()
-
-/datum/gas_mixture/proc/return_volume() //liters
-
-/datum/gas_mixture/proc/thermal_energy() //joules
 
 /datum/gas_mixture/proc/archive()
 	//Update archived versions of variables
 	//Returns: 1 in all cases
 
-/datum/gas_mixture/proc/merge(datum/gas_mixture/giver)
-	//Merges all air from giver into self. giver is untouched.
-	//Returns: 1 if we are mutable, 0 otherwise
 
 /datum/gas_mixture/proc/remove(amount)
 	//Removes amount of gas from the gas_mixture
@@ -187,12 +143,6 @@ we use a hook instead
 	//Removes amount of gas from the gas mixture by flag
 	//Returns: gas_mixture with gases that match the flag removed
 
-/datum/gas_mixture/proc/transfer_to(datum/gas_mixture/target, amount)
-	//Transfers amount of gas to target. Equivalent to target.merge(remove(amount)) but faster.
-
-/datum/gas_mixture/proc/transfer_ratio_to(datum/gas_mixture/target, ratio)
-	//Transfers ratio of gas to target. Equivalent to target.merge(remove_ratio(amount)) but faster.
-
 /datum/gas_mixture/proc/remove_ratio(ratio)
 	//Proportionally removes amount of gas from the gas_mixture
 	//Returns: gas_mixture with the gases removed
@@ -201,10 +151,6 @@ we use a hook instead
 	//Creates new, identical gas mixture
 	//Returns: duplicate gas mixture
 
-/datum/gas_mixture/proc/copy_from(datum/gas_mixture/sample)
-	//Copies variables from sample
-	//Returns: 1 if we are mutable, 0 otherwise
-
 /datum/gas_mixture/proc/copy_from_turf(turf/model)
 	//Copies all gas info from the turf into the gas list along with temperature
 	//Returns: 1 if we are mutable, 0 otherwise
@@ -217,52 +163,18 @@ we use a hook instead
 	//Performs air sharing calculations between two gas_mixtures assuming only 1 boundary length
 	//Returns: amount of gas exchanged (+ if sharer received)
 
-/datum/gas_mixture/proc/temperature_share(datum/gas_mixture/sharer, conduction_coefficient,temperature=null,heat_capacity=null)
-	//Performs temperature sharing calculations (via conduction) between two gas_mixtures assuming only 1 boundary length
-	//Returns: new temperature of the sharer
-
-/datum/gas_mixture/proc/compare(datum/gas_mixture/sample)
-	//Compares sample to self to see if within acceptable ranges that group processing may be enabled
-	//Returns: a string indicating what check failed, or "" if check passes
-
-/datum/gas_mixture/proc/react(datum/holder)
-	//Performs various reactions such as combustion or fusion (LOL)
-	//Returns: 1 if any reaction took place; 0 otherwise
-
-/datum/gas_mixture/proc/adjust_heat(amt)
-	//Adjusts the thermal energy of the gas mixture, rather than having to do the full calculation.
-	//Returns: null
-
-/datum/gas_mixture/proc/equalize_with(datum/gas_mixture/giver)
-	//Makes this mix have the same temperature and gas ratios as the giver, but with the same pressure, accounting for volume.
-	//Returns: null
-
-/datum/gas_mixture/proc/get_oxidation_power(temp)
-	//Gets how much oxidation this gas can do, optionally at a given temperature.
-
-/datum/gas_mixture/proc/get_fuel_amount(temp)
-	//Gets how much fuel for fires (not counting trit/plasma!) this gas has, optionally at a given temperature.
-
-/proc/equalize_all_gases_in_list(list/L)
-	//Makes every gas in the given list have the same pressure, temperature and gas proportions.
-	//Returns: null
-
-/datum/gas_mixture/proc/__remove_by_flag()
-
 /datum/gas_mixture/remove_by_flag(flag, amount)
 	var/datum/gas_mixture/removed = new type
 	__remove_by_flag(removed, flag, amount)
 
 	return removed
 
-/datum/gas_mixture/proc/__remove()
 /datum/gas_mixture/remove(amount)
 	var/datum/gas_mixture/removed = new type
 	__remove(removed, amount)
 
 	return removed
 
-/datum/gas_mixture/proc/__remove_ratio()
 /datum/gas_mixture/remove_ratio(ratio)
 	var/datum/gas_mixture/removed = new type
 	__remove_ratio(removed, ratio)
@@ -280,8 +192,6 @@ we use a hook instead
 	parse_gas_string(model.initial_gas_mix)
 	return TRUE
 
-/datum/gas_mixture/proc/__auxtools_parse_gas_string(gas_string)
-
 /datum/gas_mixture/parse_gas_string(gas_string)
 	gas_string = SSair.preprocess_gas_string(gas_string)
 	return __auxtools_parse_gas_string(gas_string)
diff --git a/code/modules/atmospherics/machinery/atmosmachinery.dm b/code/modules/atmospherics/machinery/atmosmachinery.dm
index 40b2515353..171412f0d8 100644
--- a/code/modules/atmospherics/machinery/atmosmachinery.dm
+++ b/code/modules/atmospherics/machinery/atmosmachinery.dm
@@ -72,14 +72,15 @@
 		armor = list(MELEE = 25, BULLET = 10, LASER = 10, ENERGY = 100, BOMB = 0, BIO = 100, RAD = 100, FIRE = 100, ACID = 70)
 	..()
 	if(process)
-		SSair.atmos_machinery += src
+		SSair.start_processing_machine(src)
 	SetInitDirections()
 
 /obj/machinery/atmospherics/Destroy()
 	for(var/i in 1 to device_type)
 		nullifyNode(i)
 
-	SSair.atmos_machinery -= src
+
+	SSair.stop_processing_machine(src)
 	SSair.pipenets_needing_rebuilt -= src
 
 	dropContents()
diff --git a/code/modules/atmospherics/machinery/other/meter.dm b/code/modules/atmospherics/machinery/other/meter.dm
index 48d69567af..26f16d329d 100644
--- a/code/modules/atmospherics/machinery/other/meter.dm
+++ b/code/modules/atmospherics/machinery/other/meter.dm
@@ -27,14 +27,14 @@
 	id_tag = ATMOS_GAS_MONITOR_LOOP_DISTRIBUTION
 
 /obj/machinery/meter/Destroy()
-	SSair.atmos_machinery -= src
+	SSair.stop_processing_machine(src)
 	target = null
 	return ..()
 
 /obj/machinery/meter/Initialize(mapload, new_piping_layer)
 	if(!isnull(new_piping_layer))
 		target_layer = new_piping_layer
-	SSair.atmos_machinery += src
+	SSair.start_processing_machine(src)
 	if(!target)
 		reattach_to_layer()
 	return ..()
diff --git a/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm b/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm
index 3613a59e0a..56ad873f85 100644
--- a/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm
+++ b/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm
@@ -16,7 +16,7 @@
 
 /obj/machinery/portable_atmospherics/New()
 	..()
-	SSair.atmos_machinery += src
+	SSair.start_processing_machine(src)
 
 	air_contents = new(volume)
 	air_contents.set_temperature(T20C)
@@ -24,8 +24,7 @@
 	return TRUE
 
 /obj/machinery/portable_atmospherics/Destroy()
-	SSair.atmos_machinery -= src
-
+	SSair.stop_processing_machine(src)
 	disconnect()
 	qdel(air_contents)
 	air_contents = null
diff --git a/code/modules/mob/living/carbon/human/human.dm b/code/modules/mob/living/carbon/human/human.dm
index 0a235b5408..c626fb0829 100644
--- a/code/modules/mob/living/carbon/human/human.dm
+++ b/code/modules/mob/living/carbon/human/human.dm
@@ -47,7 +47,7 @@
 	AddComponent(/datum/component/combat_mode)
 	AddElement(/datum/element/flavor_text/carbon, _name = "Flavor Text", _save_key = "flavor_text")
 	AddElement(/datum/element/flavor_text/carbon/temporary, "", "Set Pose (Temporary Flavor Text)", "This should be used only for things pertaining to the current round!", _save_key = null)
-	AddElement(/datum/element/flavor_text, _name = "OOC Notes", _addendum = "Put information on ERP/vore/lewd-related preferences here. THIS SHOULD NOT CONTAIN REGULAR FLAVORTEXT!!", _save_key = "ooc_notes", _examine_no_preview = TRUE)
+	AddElement(/datum/element/flavor_text, _name = "OOC Notes", _addendum = "Put information on ERP/vore/lewd-related preferences here. THIS SHOULD NOT CONTAIN REGULAR FLAVORTEXT!!", _always_show = TRUE, _save_key = "ooc_notes", _examine_no_preview = TRUE)
 	AddElement(/datum/element/strippable, GLOB.strippable_human_items, TYPE_PROC_REF(/mob/living/carbon/human, should_strip))
 
 /mob/living/carbon/human/Destroy()
diff --git a/code/modules/mob/living/carbon/monkey/combat.dm b/code/modules/mob/living/carbon/monkey/combat.dm
index 213a49d9ef..8976a0cc6d 100644
--- a/code/modules/mob/living/carbon/monkey/combat.dm
+++ b/code/modules/mob/living/carbon/monkey/combat.dm
@@ -117,7 +117,7 @@
 				pickupTarget = null
 				pickupTimer = 0
 			else
-				INVOKE_ASYNC(src, .proc/walk2derpless, pickupTarget.loc)
+				INVOKE_ASYNC(src, PROC_REF(walk2derpless), pickupTarget.loc)
 				if(Adjacent(pickupTarget) || Adjacent(pickupTarget.loc)) // next to target
 					drop_all_held_items() // who cares about these items, i want that one!
 					if(isturf(pickupTarget.loc)) // on floor
@@ -167,7 +167,7 @@
 				return TRUE
 
 			if(target != null)
-				INVOKE_ASYNC(src, .proc/walk2derpless, target)
+				INVOKE_ASYNC(src, PROC_REF(walk2derpless), target)
 
 			// pickup any nearby weapon
 			if(!pickupTarget && prob(MONKEY_WEAPON_PROB))
@@ -252,7 +252,7 @@
 
 			if(target.pulledby != src && !istype(target.pulledby, /mob/living/carbon/monkey/))
 
-				INVOKE_ASYNC(src, .proc/walk2derpless, target.loc)
+				INVOKE_ASYNC(src, PROC_REF(walk2derpless), target.loc)
 
 				if(Adjacent(target) && isturf(target.loc))
 					a_intent = INTENT_GRAB
@@ -265,7 +265,7 @@
 						frustration = 0
 
 			else if(!disposing_body)
-				INVOKE_ASYNC(src, .proc/walk2derpless, bodyDisposal.loc)
+				INVOKE_ASYNC(src, PROC_REF(walk2derpless), bodyDisposal.loc)
 
 				if(Adjacent(bodyDisposal))
 					disposing_body = TRUE
diff --git a/code/modules/mob/living/life.dm b/code/modules/mob/living/life.dm
index 01823bc0fc..bfad3339f1 100644
--- a/code/modules/mob/living/life.dm
+++ b/code/modules/mob/living/life.dm
@@ -24,7 +24,7 @@
 				break
 			var/msg = "[key_name_admin(src)] [ADMIN_JMP(src)] was found to have no .loc with an attached client, if the cause is unknown it would be wise to ask how this was accomplished."
 			message_admins(msg)
-			INVOKE_ASYNC(GLOBAL_PROC, .proc/send2tgs_adminless_only, "Mob", msg, R_ADMIN)
+			INVOKE_ASYNC(GLOBAL_PROC, GLOBAL_PROC_REF(send2tgs_adminless_only), "Mob", msg, R_ADMIN)
 			log_game("[key_name(src)] was found to have no .loc with an attached client.")
 
 		// This is a temporary error tracker to make sure we've caught everything
diff --git a/code/modules/power/generator.dm b/code/modules/power/generator.dm
index f1beecacb9..af427f1c40 100644
--- a/code/modules/power/generator.dm
+++ b/code/modules/power/generator.dm
@@ -19,7 +19,7 @@
 	. = ..()
 	find_circs()
 	connect_to_network()
-	SSair.atmos_machinery += src
+	SSair.start_processing_machine(src)
 	update_icon()
 	component_parts = list(new /obj/item/circuitboard/machine/generator)
 
@@ -29,7 +29,7 @@
 
 /obj/machinery/power/generator/Destroy()
 	kill_circs()
-	SSair.atmos_machinery -= src
+	SSair.stop_processing_machine(src)
 	return ..()
 
 /obj/machinery/power/generator/update_overlays()
diff --git a/code/modules/power/reactor/rbmk.dm b/code/modules/power/reactor/rbmk.dm
index 24b562a8cf..f49148faad 100644
--- a/code/modules/power/reactor/rbmk.dm
+++ b/code/modules/power/reactor/rbmk.dm
@@ -444,7 +444,7 @@ The reactor CHEWS through moderator. It does not do this slowly. Be very careful
 //Results: Engineering becomes unusable and your engine irreparable
 /obj/machinery/atmospherics/components/trinary/nuclear_reactor/proc/meltdown()
 	set waitfor = FALSE
-	SSair.atmos_machinery -= src //Annd we're now just a useless brick.
+	SSair.stop_processing_machine(src)
 	slagged = TRUE
 	color = null
 	update_icon()
diff --git a/code/modules/power/supermatter/supermatter.dm b/code/modules/power/supermatter/supermatter.dm
index c456887460..157ad6a627 100644
--- a/code/modules/power/supermatter/supermatter.dm
+++ b/code/modules/power/supermatter/supermatter.dm
@@ -195,7 +195,7 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 /obj/machinery/power/supermatter_crystal/Initialize(mapload)
 	. = ..()
 	uid = gl_uid++
-	SSair.atmos_machinery += src
+	SSair.start_processing_machine(src)
 	countdown = new(src)
 	countdown.start()
 	GLOB.poi_list |= src
@@ -214,7 +214,7 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 
 /obj/machinery/power/supermatter_crystal/Destroy()
 	investigate_log("has been destroyed.", INVESTIGATE_SUPERMATTER)
-	SSair.atmos_machinery -= src
+	SSair.stop_processing_machine(src)
 	QDEL_NULL(radio)
 	GLOB.poi_list -= src
 	QDEL_NULL(countdown)
diff --git a/code/modules/procedural_mapping/mapGenerator.dm b/code/modules/procedural_mapping/mapGenerator.dm
index 532c7026cd..ae016cf2bb 100644
--- a/code/modules/procedural_mapping/mapGenerator.dm
+++ b/code/modules/procedural_mapping/mapGenerator.dm
@@ -153,10 +153,10 @@
 		return
 
 	var/endInput = input(usr,"End turf of Map (X;Y;Z)", "Map Gen Settings", "[world.maxx];[world.maxy];[mob ? mob.z : 1]") as text|null
-	
+
 	if (isnull(endInput))
 		return
-	
+
 	//maxx maxy and current z so that if you fuck up, you only fuck up one entire z level instead of the entire universe
 	if(!startInput || !endInput)
 		to_chat(src, "Missing Input")
diff --git a/code/modules/vehicles/speedbike.dm b/code/modules/vehicles/speedbike.dm
index d0b9c1fe96..2988be55ce 100644
--- a/code/modules/vehicles/speedbike.dm
+++ b/code/modules/vehicles/speedbike.dm
@@ -44,7 +44,7 @@
 	icon = 'icons/obj/car.dmi'
 	icon_state = "speedwagon"
 	layer = LYING_MOB_LAYER
-	var/static/mutable_appearance/overlay = mutable_appearance(icon, "speedwagon_cover", ABOVE_MOB_LAYER)
+	var/static/mutable_appearance/overlay
 	max_buckled_mobs = 4
 	var/crash_all = FALSE //CHAOS
 	pixel_y = -48
@@ -52,6 +52,7 @@
 
 /obj/vehicle/ridden/space/speedwagon/Initialize(mapload)
 	. = ..()
+	overlay = mutable_appearance(icon, "speedwagon_cover", ABOVE_MOB_LAYER)
 	add_overlay(overlay)
 	var/datum/component/riding/D = LoadComponent(/datum/component/riding)
 	D.vehicle_move_delay = 0
diff --git a/dependencies.sh b/dependencies.sh
index 3e18634e0d..a9f562ade7 100644
--- a/dependencies.sh
+++ b/dependencies.sh
@@ -4,8 +4,8 @@
 #Final authority on what's required to fully build the project
 
 # byond version
-export BYOND_MAJOR=514
-export BYOND_MINOR=1589
+export BYOND_MAJOR=515
+export BYOND_MINOR=1634
 
 #rust_g git tag
 export RUST_G_VERSION=0.4.10
@@ -15,13 +15,13 @@ export NODE_VERSION=16
 export NODE_VERSION_PRECISE=16.13.1
 
 # SpacemanDMM git tag
-export SPACEMAN_DMM_VERSION=suite-1.7
+export SPACEMAN_DMM_VERSION=suite-1.8
 
 # Python version for mapmerge and other tools
 export PYTHON_VERSION=3.7.9
 
 # Auxmos git tag
-export AUXMOS_VERSION=v2.4.1
+export AUXMOS_VERSION=v2.5.1
 
 # Extools git tag
 export EXTOOLS_VERSION=v0.0.7
diff --git a/tgstation.dme b/tgstation.dme
index 97c9575439..e20e9f4977 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -19,7 +19,6 @@
 #include "code\__byond_version_compat.dm"
 #include "code\_compile_options.dm"
 #include "code\world.dm"
-#include "code\__DEFINES\_auxtools.dm"
 #include "code\__DEFINES\_click.dm"
 #include "code\__DEFINES\_globals.dm"
 #include "code\__DEFINES\_protect.dm"
@@ -30,6 +29,7 @@
 #include "code\__DEFINES\admin.dm"
 #include "code\__DEFINES\antagonists.dm"
 #include "code\__DEFINES\atmospherics.dm"
+#include "code\__DEFINES\bindings.dm"
 #include "code\__DEFINES\bitfields.dm"
 #include "code\__DEFINES\blackmarket.dm"
 #include "code\__DEFINES\botany.dm"
@@ -188,8 +188,8 @@
 #include "code\__DEFINES\skills\helpers.dm"
 #include "code\__DEFINES\storage\_storage.dm"
 #include "code\__DEFINES\storage\volumetrics.dm"
+#include "code\__HELPERS\_auxtools_api.dm"
 #include "code\__HELPERS\_cit_helpers.dm"
-#include "code\__HELPERS\_extools_api.dm"
 #include "code\__HELPERS\_lists.dm"
 #include "code\__HELPERS\_logging.dm"
 #include "code\__HELPERS\_string_lists.dm"
diff --git a/tgui/.editorconfig b/tgui/.editorconfig
index 33092d4928..c0f2cb2c8b 100644
--- a/tgui/.editorconfig
+++ b/tgui/.editorconfig
@@ -7,7 +7,4 @@ indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
-insert_final_newline = true
-
-[*.md]
-max_line_length = 80
+insert_final_newline = true
\ No newline at end of file
diff --git a/tgui/.eslintrc.yml b/tgui/.eslintrc.yml
index dd85d4ca15..a6adec4037 100644
--- a/tgui/.eslintrc.yml
+++ b/tgui/.eslintrc.yml
@@ -368,14 +368,15 @@ rules:
   ## Enforce a maximum depth that blocks can be nested
   # max-depth: error
   ## Enforce a maximum line length
-  max-len: [error, {
-    code: 80,
-    ## Ignore imports
-    ignorePattern: '^(import\s.+\sfrom\s|.*require\()',
-    ignoreUrls: true,
-    ignoreRegExpLiterals: true,
-    ignoreStrings: true,
-  }]
+  # max-len: [error, {
+  #   code: 80,
+  #   ## Ignore imports
+  #   ignorePattern: '^(import\s.+\sfrom\s|.*require\()',
+  #   ignoreUrls: true,
+  #   ignoreRegExpLiterals: true,
+  #   ignoreStrings: true,
+  #   ignoreTemplateLiterals: true,
+  # }]
   ## Enforce a maximum number of lines per file
   # max-lines: error
   ## Enforce a maximum number of line of code in a function
diff --git a/tgui/packages/tgui-dev-server/dreamseeker.js b/tgui/packages/tgui-dev-server/dreamseeker.js
index 3d4149cf25..21ad32e064 100644
--- a/tgui/packages/tgui-dev-server/dreamseeker.js
+++ b/tgui/packages/tgui-dev-server/dreamseeker.js
@@ -28,6 +28,9 @@ export class DreamSeeker {
       .map(key => encodeURIComponent(key)
         + '=' + encodeURIComponent(params[key]))
       .join('&');
+    logger.log(
+      `topic call at ${this.client.defaults.baseURL + '/dummy?' + query}`
+    );
     return this.client.get('/dummy?' + query);
   }
 }
diff --git a/tgui/packages/tgui-dev-server/reloader.js b/tgui/packages/tgui-dev-server/reloader.js
index 5722cee644..c2bc552e00 100644
--- a/tgui/packages/tgui-dev-server/reloader.js
+++ b/tgui/packages/tgui-dev-server/reloader.js
@@ -67,8 +67,6 @@ export const findCacheRoot = async () => {
 
 const onCacheRootFound = cacheRoot => {
   logger.log(`found cache at '${cacheRoot}'`);
-  // Plant a dummy
-  fs.closeSync(fs.openSync(cacheRoot + '/dummy', 'w'));
 };
 
 export const reloadByondCache = async bundleDir => {
@@ -93,6 +91,9 @@ export const reloadByondCache = async bundleDir => {
     // Clear garbage
     const garbage = await resolveGlob(cacheDir, './*.+(bundle|chunk|hot-update).*');
     try {
+      // Plant a dummy browser window file, we'll be using this to avoid world topic
+      fs.closeSync(fs.openSync(cacheDir + '/dummy', 'w'));
+
       for (let file of garbage) {
         fs.unlinkSync(file);
       }
diff --git a/tgui/public/tgui.html b/tgui/public/tgui.html
index 5bda2a9b81..84b00709bb 100644
--- a/tgui/public/tgui.html
+++ b/tgui/public/tgui.html
@@ -48,8 +48,9 @@ if (window.__windowId__ === '[' + 'tgui:windowId' + ']') {
   // Basic checks to detect whether this page runs in BYOND
   var isByond = (tridentVersion !== null || window.cef_to_byond)
     && location.hostname === '127.0.0.1'
-    && location.pathname.indexOf('/tmp') === 0
     && location.search !== '?external';
+    //As of BYOND 515 the path doesn't seem to include tmp dir anymore if you're trying to open tgui in external browser and looking why it doesn't work
+    //&& location.pathname.indexOf('/tmp') === 0
 
   // Version constants
   Byond.IS_BYOND = isByond;
@@ -202,6 +203,8 @@ if (window.__windowId__ === '[' + 'tgui:windowId' + ']') {
     var len = styleSheets.length;
     for (var i = 0; i < len; i++) {
       var styleSheet = styleSheets[i];
+      if(styleSheet.href === undefined)
+        continue;
       if (styleSheet.href.indexOf(url) !== -1) {
         return styleSheet.rules.length > 0;
       }
diff --git a/tools/LinuxOneShot/docker-compose.yml b/tools/LinuxOneShot/docker-compose.yml
index c7002f4565..c2780a6a95 100644
--- a/tools/LinuxOneShot/docker-compose.yml
+++ b/tools/LinuxOneShot/docker-compose.yml
@@ -38,7 +38,7 @@ services:
       driver: none
   setup:
     environment:
-      TGS_BYOND: 513.1514
+      TGS_BYOND: 515.1634
       TGS_REPO: https://github.com/tgstation/tgstation
     build:
       context: ./SetupProgram
diff --git a/tools/build/.editorconfig b/tools/build/.editorconfig
index 33092d4928..c0f2cb2c8b 100644
--- a/tools/build/.editorconfig
+++ b/tools/build/.editorconfig
@@ -7,7 +7,4 @@ indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
-insert_final_newline = true
-
-[*.md]
-max_line_length = 80
+insert_final_newline = true
\ No newline at end of file
diff --git a/tools/ci/check_grep.sh b/tools/ci/check_grep.sh
index eb83ab46f8..bdf81330ef 100755
--- a/tools/ci/check_grep.sh
+++ b/tools/ci/check_grep.sh
@@ -4,6 +4,12 @@ set -euo pipefail
 #nb: must be bash to support shopt globstar
 shopt -s globstar
 
+#ANSI Escape Codes for colors to increase contrast of errors
+RED="\033[0;31m"
+GREEN="\033[0;32m"
+BLUE="\033[0;34m"
+NC="\033[0m" # No Color
+
 st=0
 
 if git grep -P "\r\n"; then
@@ -117,4 +123,20 @@ do
     done < <(jq -r '[.map_file] | flatten | .[]' $json)
 done
 
+# Check for non-515 compatable .proc/ syntax
+if grep -P --exclude='__byond_version_compat.dm' '\.proc/' code/**/*.dm; then
+    echo
+    echo -e "${RED}ERROR: Outdated proc reference use detected in code, please use proc reference helpers.${NC}"
+    st=1
+fi;
+
+if [ $st = 0 ]; then
+    echo
+    echo -e "${GREEN}No errors found using grep!${NC}"
+fi;
+if [ $st = 1 ]; then
+    echo
+    echo -e "${RED}Errors found, please fix them and try again.${NC}"
+fi;
+
 exit $st