Makes some more lists lazy (#94388)

Co-authored-by: SyncIt21 <110812394+SyncIt21@users.noreply.github.com>
Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>

code/__DEFINES/crafting.dm

@@ -37,6 +37,14 @@
 /// This craft won't change the materials of the resulting item to match that of the combined components
 #define CRAFT_NO_MATERIALS (1<<10)
 
+//Crafting blacklist behaviors
+/// By default, blacklist the result if it's not in reqs
+#define BLACKLIST_RESULT_IF_NOT_IN_REQS null
+/// Always blacklist - override default behavior
+#define ALWAYS_BLACKLIST_RESULT TRUE
+/// Never blacklist - override default behavior
+#define NEVER_BLACKLIST_RESULT FALSE
+
 //food/drink crafting defines
 //When adding new defines, please make sure to also add them to the encompassing list
 #define CAT_FOOD "Foods"

code/__HELPERS/global_lists.dm

@@ -11,11 +11,9 @@
 	init_crafting_recipes_atoms()
 
 /// Inits crafting recipe lists
-/proc/init_crafting_recipes(list/crafting_recipes)
-	for(var/path in subtypesof(/datum/crafting_recipe))
-		if(ispath(path, /datum/crafting_recipe/stack))
-			continue
-		var/datum/crafting_recipe/recipe = new path()
+/proc/init_crafting_recipes()
+	for(var/datum/crafting_recipe_path as anything in valid_subtypesof(/datum/crafting_recipe))
+		var/datum/crafting_recipe/recipe = new crafting_recipe_path()
 		var/is_cooking = (recipe.category in GLOB.crafting_category_food)
 		recipe.reqs = sort_list(recipe.reqs, GLOBAL_PROC_REF(cmp_crafting_req_priority))
 		if(recipe.name != "" && recipe.result)

code/datums/actions/mobs/defensive_mode.dm

@@ -34,7 +34,7 @@
 	defence(owner_mob)
 
 /datum/action/cooldown/mob_cooldown/defensive_mode/proc/offence(mob/living/basic/owner_mob)
-	owner_mob.damage_coeff = list(BRUTE = 1, BURN = 1.25, TOX = 1, STAMINA = 1, OXY = 1)
+	owner_mob.damage_coeff = string_assoc_list(list(BRUTE = 1, BURN = 1.25, TOX = 1, STAMINA = 1, OXY = 1))
 	owner_mob.icon_state = initial(owner_mob.icon_state)
 	owner_mob.icon_living = initial(owner_mob.icon_living)
 	owner_mob.icon_dead = initial(owner_mob.icon_dead)
@@ -42,7 +42,7 @@
 	defense_active = FALSE
 
 /datum/action/cooldown/mob_cooldown/defensive_mode/proc/defence(mob/living/basic/owner_mob)
-	owner_mob.damage_coeff = list(BRUTE = 0.4, BURN = 0.5, TOX = 1, STAMINA = 1, OXY = 1)
+	owner_mob.damage_coeff = string_assoc_list(list(BRUTE = 0.4, BURN = 0.5, TOX = 1, STAMINA = 1, OXY = 1))
 	owner_mob.icon_dead = "[owner_mob.icon_state]_d_dead"
 	owner_mob.icon_state = "[owner_mob.icon_state]_d"
 	owner_mob.icon_living = "[owner_mob.icon_living]_d"

code/datums/ai/basic_mobs/basic_subtrees/speech_subtree.dm

@@ -2,23 +2,23 @@
 	//The chance of an emote occurring each second
 	var/speech_chance = 0
 	///Hearable emotes
-	var/list/emote_hear = list()
+	var/list/emote_hear
 	///Unlike speak_emote, the list of things in this variable only show by themselves with no spoken text. IE: Ian barks, Ian yaps
-	var/list/emote_see = list()
+	var/list/emote_see
 	///Possible lines of speech the AI can have
-	var/list/speak = list()
+	var/list/speak
 	///The sound effects associated with this speech, if any
-	var/list/sound = list()
+	var/list/sound
 
 /datum/ai_planning_subtree/random_speech/New()
 	. = ..()
-	if(speak)
+	if(LAZYLEN(speak))
 		speak = string_list(speak)
-	if(sound)
+	if(LAZYLEN(sound))
 		sound = string_list(sound)
-	if(emote_hear)
+	if(LAZYLEN(emote_hear))
 		emote_hear = string_list(emote_hear)
-	if(emote_see)
+	if(LAZYLEN(emote_see))
 		emote_see = string_list(emote_see)
 
 /datum/ai_planning_subtree/random_speech/SelectBehaviors(datum/ai_controller/controller, seconds_per_tick)

code/datums/components/chasm.dm

@@ -6,7 +6,7 @@
 	var/oblivion_message = "You stumble and stare into the abyss before you. It stares back, and you fall into the enveloping dark."
 
 	/// List of refs to falling objects -> how many levels deep we've fallen
-	var/static/list/falling_atoms = list()
+	var/static/list/falling_atoms
 	var/static/list/forbidden_types = typecacheof(list(
 		/obj/docking_port,
 		/obj/effect/abstract,
@@ -106,7 +106,8 @@
 /datum/component/chasm/proc/droppable(atom/movable/dropped_thing)
 	var/datum/weakref/falling_ref = WEAKREF(dropped_thing)
 	// avoid an infinite loop, but allow falling a large distance
-	if(falling_atoms[falling_ref] && falling_atoms[falling_ref] > 30)
+	var/falling_atom = LAZYACCESS(falling_atoms, falling_ref)
+	if(falling_atom && falling_atom > 30)
 		return CHASM_NOT_DROPPING
 	if(is_type_in_typecache(dropped_thing, forbidden_types) || (!isliving(dropped_thing) && !isobj(dropped_thing)))
 		return CHASM_NOT_DROPPING
@@ -133,14 +134,14 @@
 	var/datum/weakref/falling_ref = WEAKREF(dropped_thing)
 	//Make sure the item is still there after our sleep
 	if(!dropped_thing || !falling_ref?.resolve())
-		falling_atoms -= falling_ref
+		LAZYREMOVE(falling_atoms, falling_ref)
 		return
 
-	falling_atoms[falling_ref] = (falling_atoms[falling_ref] || 0) + 1
+	LAZYSET(falling_atoms, falling_ref, (falling_atoms[falling_ref] || 0) + 1)
 	var/turf/below_turf = target_turf
 	var/atom/parent = src.parent
 
-	if(falling_atoms[falling_ref] > 1)
+	if(LAZYACCESS(falling_atoms, falling_ref) > 1)
 		return // We're already handling this
 
 	if(SEND_SIGNAL(dropped_thing, COMSIG_MOVABLE_CHASM_DROPPED, parent) & COMPONENT_NO_CHASM_DROP)
@@ -164,7 +165,7 @@
 			var/mob/living/fallen = dropped_thing
 			fallen.Paralyze(100)
 			fallen.adjust_brute_loss(30)
-		falling_atoms -= falling_ref
+		LAZYREMOVE(falling_atoms, falling_ref)
 		return
 
 	// send to oblivion
@@ -235,7 +236,7 @@
 			fallen_mob.death(TRUE)
 			fallen_mob.apply_damage(300)
 
-	falling_atoms -= falling_ref
+	LAZYREMOVE(falling_atoms, falling_ref)
 
 /**
  * Called when something has left the chasm depths storage.

code/datums/components/crafting/_recipes.dm

@@ -8,7 +8,7 @@
 	///type paths of items consumed associated with how many are needed
 	var/list/reqs = list()
 	///type paths of items explicitly not allowed as an ingredient
-	var/list/blacklist = list()
+	var/list/blacklist
 	///type path of item resulting from this craft
 	var/result
 	/// String defines of items needed but not consumed. Lazy list.
@@ -23,13 +23,13 @@
 	///time in seconds. Remember to use the SECONDS define!
 	var/time = 3 SECONDS
 	///type paths of items that will be forceMoved() into the result instead of being deleted
-	var/list/parts = list()
+	var/list/parts
 	///items, structures and machineries of types that are in this list won't transfer their materials to the result
 	var/list/requirements_mats_blacklist
 	///if set, the materials in this list and their values will be subtracted from the result.
 	var/list/removed_mats
 	///like tool_behaviors but for reagents
-	var/list/chem_catalysts = list()
+	var/list/chem_catalysts
 	///where it shows up in the crafting UI
 	var/category
 	///Required machines for the craft, set the assigned value of the typepath to CRAFTING_MACHINERY_CONSUME or CRAFTING_MACHINERY_USE. Lazy associative list: type_path key -> flag value.
@@ -50,19 +50,15 @@
 	var/delete_contents = TRUE
 	/// Allows you to craft so that you don't have to click the craft button many times.
 	var/mass_craftable = FALSE
-
 	///crafting_flags var to hold bool values
 	var/crafting_flags = CRAFT_CHECK_DENSITY
-
-/datum/crafting_recipe/New()
-	if(!name && result)
-		var/atom/atom_result = result
-		name = initial(atom_result.name)
-
-	if(!(result in reqs))
-		blacklist += result
-	// These should be excluded from all crafting recipies
-	blacklist += list(
+	/**
+	* Should the recipe blacklist its result? Default behavior is to blacklist any result that isn't in reqs.
+	* Can be set to ALWAYS_BLACKLIST_RESULT or NEVER_BLACKLIST_RESULT to override the default behavior.
+	*/
+	var/blacklist_result = BLACKLIST_RESULT_IF_NOT_IN_REQS
+	/// Global crafting blacklist. These should be excluded from all crafting recipes no matter what.
+	var/static/list/global_blacklist = typecacheof(list(
 		/obj/item/cautery/augment,
 		/obj/item/cautery/cruel/augment,
 		/obj/item/circular_saw/augment,
@@ -81,15 +77,25 @@
 		/obj/item/weldingtool/largetank/cyborg,
 		/obj/item/wirecutters/cyborg,
 		/obj/item/wrench/cyborg,
-	)
+	))
+
+/datum/crafting_recipe/New()
+	if(!name && result)
+		var/atom/atom_result = result
+		name = initial(atom_result.name)
+	if(result && blacklist_result == BLACKLIST_RESULT_IF_NOT_IN_REQS && !(result in reqs))
+		blacklist_result = ALWAYS_BLACKLIST_RESULT
 	if(tool_behaviors)
 		tool_behaviors = string_list(tool_behaviors)
 	if(tool_paths)
 		tool_paths = string_list(tool_paths)
-	for(var/key in parts)
-		if(!parts[key])
+	for(var/key, part in parts)
+		if(!part)
 			//ensure every single, same-type part used for the recipe will be transferred if the value is otherwise not specified
-			parts[key] = INFINITY
+			part = INFINITY
+
+/datum/crafting_recipe/stack
+	abstract_type = /datum/crafting_recipe/stack
 
 /datum/crafting_recipe/stack/New(obj/item/stack/material, datum/stack_recipe/stack_recipe)
 	if(!material || !stack_recipe || !stack_recipe.result_type)

code/datums/components/crafting/crafting.dm

@@ -68,12 +68,17 @@
 	var/list/requirements_list = list()
 
 	// Process all requirements
-	for(var/requirement_path in recipe.reqs)
+	var/recipe_result
+	if(recipe.blacklist_result)
+		recipe_result = recipe.result
+	for(var/requirement_path, needed_amount in recipe.reqs)
 		// Check we have the appropriate amount available in the contents list
-		var/needed_amount = recipe.reqs[requirement_path]
 		for(var/content_item_path in contents)
 			// Right path and not blacklisted
-			if(!ispath(content_item_path, requirement_path) || recipe.blacklist.Find(content_item_path))
+			if(!ispath(content_item_path, requirement_path) || (content_item_path in recipe.blacklist) || is_type_in_typecache(recipe.global_blacklist, content_item_path))
+				continue
+			// If we are a recipe that is blacklisting its result, make sure we skip that path
+			if(recipe_result && content_item_path == recipe_result)
 				continue
 
 			needed_amount -= contents[content_item_path]
@@ -85,14 +90,14 @@
 
 		// Store the instances of what we will use for recipe.check_requirements() for requirement_path
 		var/list/instances_list = list()
-		for(var/instance_path in item_instances)
+		for(var/instance_path, item_instance in item_instances)
 			if(ispath(instance_path, requirement_path))
-				instances_list += item_instances[instance_path]
+				instances_list += item_instance
 
 		requirements_list[requirement_path] = instances_list
 
-	for(var/requirement_path in recipe.chem_catalysts)
-		if(contents[requirement_path] < recipe.chem_catalysts[requirement_path])
+	for(var/requirement_path, chem_amount in recipe.chem_catalysts)
+		if(contents[requirement_path] < chem_amount)
 			return FALSE
 
 	var/mech_found = FALSE
@@ -245,8 +250,7 @@
 	var/list/total_materials = list()
 	var/list/stuff_to_use = get_used_reqs(recipe, crafter, total_materials)
 
-	for(var/mat in recipe.removed_mats)
-		var/to_remove = recipe.removed_mats[mat]
+	for(var/mat, to_remove in recipe.removed_mats)
 		var/datum/material/ref_mat = locate(mat) in total_materials
 		if(!ref_mat)
 			continue
@@ -680,11 +684,11 @@
 			data["reqs"]["[id]"] = recipe.reqs[req_atom]
 
 	// Catalysts
-	if(recipe.chem_catalysts.len)
+	if(LAZYLEN(recipe.chem_catalysts))
 		data["chem_catalysts"] = list()
-		for(var/req_atom in recipe.chem_catalysts)
+		for(var/req_atom, chem_amount in recipe.chem_catalysts)
 			var/id = atoms.Find(req_atom)
-			data["chem_catalysts"]["[id]"] = recipe.chem_catalysts[req_atom]
+			data["chem_catalysts"]["[id]"] = chem_amount
 
 	// Reaction data
 	if(ispath(recipe.reaction))

code/datums/components/crafting/equipment.dm

@@ -10,8 +10,8 @@
 	category = CAT_EQUIPMENT
 
 /datum/crafting_recipe/strobeshield/New()
-	..()
-	blacklist |= subtypesof(/obj/item/shield/riot)
+	LAZYADD(blacklist, typecacheof(/obj/item/shield/riot, ignore_root_path = TRUE))
+	return ..()
 
 /datum/crafting_recipe/improvisedshield
 	name = "Improvised Shield"
@@ -33,8 +33,19 @@
 	time = 4 SECONDS
 	category = CAT_EQUIPMENT
 
+/datum/crafting_recipe/radio_containing
+	abstract_type = /datum/crafting_recipe/radio_containing
+	/// Shared blacklist of all the radio types for anything that uses a radio in its construction, so we don't repeat it.
+	var/static/list/radio_types_blacklist
 
-/datum/crafting_recipe/radiogloves
+/datum/crafting_recipe/radio_containing/New()
+	if(isnull(radio_types_blacklist))
+		// because we got shit like /obj/item/radio/off ... WHY!?!
+		radio_types_blacklist = typecacheof(list(/obj/item/radio/headset, /obj/item/radio/intercom))
+	blacklist = radio_types_blacklist
+	return ..()
+
+/datum/crafting_recipe/radio_containing/radiogloves
 	name = "Radio Gloves"
 	result = /obj/item/clothing/gloves/radio
 	time = 1.5 SECONDS
@@ -46,11 +57,6 @@
 	tool_behaviors = list(TOOL_WIRECUTTER)
 	category = CAT_EQUIPMENT
 
-/datum/crafting_recipe/radiogloves/New()
-	..()
-	blacklist |= typesof(/obj/item/radio/headset)
-	blacklist |= typesof(/obj/item/radio/intercom)
-
 /datum/crafting_recipe/wheelchair
 	name = "Wheelchair"
 	result = /obj/vehicle/ridden/wheelchair
@@ -163,8 +169,8 @@
 	category = CAT_EQUIPMENT
 
 /datum/crafting_recipe/flashlight_eyes/New()
-	. = ..()
-	blacklist += typesof(/obj/item/flashlight/flare)
+	LAZYADD(blacklist, typecacheof(/obj/item/flashlight/flare))
+	return ..()
 
 /datum/crafting_recipe/extendohand_r
 	name = "Extendo-Hand (Right Arm)"
@@ -308,8 +314,8 @@
 	tool_behaviors = list(TOOL_WELDER, TOOL_SCREWDRIVER, TOOL_WIRECUTTER)
 
 /datum/crafting_recipe/morbid_surgical_toolset/New()
-	..()
-	blacklist |= subtypesof(/obj/item/organ/cyberimp/arm/toolkit/surgery)
+	LAZYADD(blacklist, typecacheof(/obj/item/organ/cyberimp/arm/toolkit/surgery, ignore_root_path = TRUE))
+	return ..()
 
 /datum/crafting_recipe/surgical_toolset
 	name = "Surgical Toolset Implant"

code/datums/components/crafting/melee_weapon.dm

@@ -89,7 +89,6 @@
 	time = 4 SECONDS
 	category = CAT_WEAPON_MELEE
 
-
 /datum/crafting_recipe/balloon_mallet
 	name = "Balloon Mallet"
 	result = /obj/item/balloon_mallet

code/datums/components/crafting/ranged_weapon.dm

@@ -67,8 +67,8 @@
 	category = CAT_WEAPON_RANGED
 
 /datum/crafting_recipe/advancedegun/New()
-	..()
-	blacklist += subtypesof(/obj/item/gun/energy/e_gun)
+	LAZYADD(blacklist, typecacheof(/obj/item/gun/energy/e_gun, ignore_root_path = TRUE))
+	return ..()
 
 /datum/crafting_recipe/tempgun
 	name = "Temperature Gun"
@@ -81,8 +81,8 @@
 	category = CAT_WEAPON_RANGED
 
 /datum/crafting_recipe/tempgun/New()
-	..()
-	blacklist += subtypesof(/obj/item/gun/energy/e_gun)
+	LAZYADD(blacklist, typecacheof(/obj/item/gun/energy/e_gun, ignore_root_path = TRUE))
+	return ..()
 
 /datum/crafting_recipe/beam_rifle
 	name = "Event Horizon Anti-Existential Beam Rifle"
@@ -108,7 +108,18 @@
 	time = 10 SECONDS
 	category = CAT_WEAPON_RANGED
 
-/datum/crafting_recipe/xraylaser
+/datum/crafting_recipe/laser
+	abstract_type = /datum/crafting_recipe/laser
+	/// We will use the same blacklist for every type here to avoid repeating lists
+	var/static/list/laser_blacklist
+
+/datum/crafting_recipe/laser/New()
+	if(isnull(laser_blacklist))
+		laser_blacklist = typecacheof(/obj/item/gun/energy/laser, ignore_root_path = TRUE)
+	blacklist = laser_blacklist
+	return ..()
+
+/datum/crafting_recipe/laser/xraylaser
 	name = "X-ray Laser Gun"
 	result = /obj/item/gun/energy/laser/xray
 	reqs = list(
@@ -118,11 +129,7 @@
 	time = 10 SECONDS
 	category = CAT_WEAPON_RANGED
 
-/datum/crafting_recipe/xraylaser/New()
-	..()
-	blacklist += subtypesof(/obj/item/gun/energy/laser)
-
-/datum/crafting_recipe/hellgun
+/datum/crafting_recipe/laser/hellgun
 	name = "Hellfire Laser Gun"
 	result = /obj/item/gun/energy/laser/hellgun
 	reqs = list(
@@ -132,11 +139,7 @@
 	time = 10 SECONDS
 	category = CAT_WEAPON_RANGED
 
-/datum/crafting_recipe/hellgun/New()
-	..()
-	blacklist += subtypesof(/obj/item/gun/energy/laser)
-
-/datum/crafting_recipe/ioncarbine
+/datum/crafting_recipe/laser/ioncarbine
 	name = "Ion Carbine"
 	result = /obj/item/gun/energy/ionrifle/carbine
 	reqs = list(
@@ -146,10 +149,6 @@
 	time = 10 SECONDS
 	category = CAT_WEAPON_RANGED
 
-/datum/crafting_recipe/ioncarbine/New()
-	..()
-	blacklist += subtypesof(/obj/item/gun/energy/laser)
-
 /datum/crafting_recipe/teslacannon
 	name = "Tesla Cannon"
 	result = /obj/item/gun/energy/tesla_cannon
@@ -241,8 +240,8 @@
 		/obj/item/gun/ballistic/rifle/rebarxbow = 1,
 	)
 	blacklist = list(
-	/obj/item/gun/ballistic/rifle/rebarxbow/forced,
-	/obj/item/gun/ballistic/rifle/rebarxbow/syndie,
+		/obj/item/gun/ballistic/rifle/rebarxbow/forced,
+		/obj/item/gun/ballistic/rifle/rebarxbow/syndie,
 	)
 	tool_behaviors = list(TOOL_CROWBAR)
 	time = 1 SECONDS
@@ -289,8 +288,8 @@
 	crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_MUST_BE_LEARNED
 
 /datum/crafting_recipe/deagle_prime/New()
-	..()
-	blacklist += subtypesof(/obj/item/gun/ballistic/automatic/pistol)
+	LAZYADD(blacklist, typecacheof(/obj/item/gun/ballistic/automatic/pistol, ignore_root_path = TRUE))
+	return ..()
 
 /datum/crafting_recipe/deagle_prime_mag
 	name = "Regal Condor Magazine (10mm Reaper)"

code/datums/components/crafting/tailoring.dm

@@ -421,12 +421,7 @@
 	)
 	reqs = list(/obj/item/stack/sheet/cloth = 4)
 	category = CAT_CLOTHING
-
-/datum/crafting_recipe/chaplain_hood/New()
-	. = ..()
-	//the resulting hoodie can be used to craft other hoodies.
-	//recipe blacklists should be refactored to only affect components and not tools.
-	blacklist -= result
+	blacklist_result = NEVER_BLACKLIST_RESULT //the resulting hoodie can be used to craft other hoodies.
 
 /datum/crafting_recipe/flower_garland
 	name = "Flower Garland"

code/datums/components/ground_sinking.dm

@@ -36,7 +36,7 @@
 			heal_when_sinked = TRUE,
 			health_per_second = 1,
 			outline_colour = COLOR_PALE_GREEN,
-			damage_res_sinked = list(BRUTE = 1, BURN = 1, TOX = 1, STAMINA = 0, OXY = 1))
+			damage_res_sinked = string_assoc_list(list(BRUTE = 1, BURN = 1, TOX = 1, STAMINA = 0, OXY = 1)))
 
 	if (!isbasicmob(parent))
 		return COMPONENT_INCOMPATIBLE
@@ -112,7 +112,7 @@
 	if(sinked && heal_when_sinked)
 		stop_regenerating()
 	living_target.icon_state = target_icon_state
-	living_target.damage_coeff = list(BRUTE = 1, BURN = 1, TOX = 1, STAMINA = 0, OXY = 1)
+	living_target.damage_coeff = string_assoc_list(list(BRUTE = 1, BURN = 1, TOX = 1, STAMINA = 0, OXY = 1))
 	living_target.set_density(TRUE)
 	sinked = FALSE
 

code/datums/components/soapbox.dm

@@ -1,6 +1,6 @@
 /datum/component/soapbox
 	/// List of our current soapboxxer(s) who are gaining loud speech
-	var/list/soapboxers = list()
+	var/list/soapboxers
 	/// Gives atoms moving over us the soapbox speech and takes it away when they leave
 	var/static/list/loc_connections = list(
 		COMSIG_ATOM_ENTERED = PROC_REF(on_loc_entered),
@@ -21,21 +21,21 @@
 	if(QDELETED(soapbox_arrive))
 		return
 	RegisterSignal(soapbox_arrive, COMSIG_MOB_SAY, PROC_REF(soapbox_speech))
-	soapboxers += soapbox_arrive
+	LAZYADD(soapboxers, soapbox_arrive)
 
 ///Takes away loud speech from our movable when it leaves the turf our parent is on
 /datum/component/soapbox/proc/on_loc_exited(datum/source, mob/living/soapbox_leave)
 	SIGNAL_HANDLER
 	if(soapbox_leave in soapboxers)
 		UnregisterSignal(soapbox_leave, COMSIG_MOB_SAY)
-		soapboxers -= soapbox_leave
+		LAZYREMOVE(soapboxers, soapbox_leave)
 
 ///We don't want our soapboxxer to keep their loud say if the parent is moved out from under them
 /datum/component/soapbox/proc/parent_moved(datum/source)
 	SIGNAL_HANDLER
 	for(var/atom/movable/loud as anything in soapboxers)
 		UnregisterSignal(loud, COMSIG_MOB_SAY)
-	soapboxers.Cut()
+	LAZYNULL(soapboxers)
 
 ///Gives a mob a unique say span
 /datum/component/soapbox/proc/soapbox_speech(datum/source, list/speech_args)

code/datums/dna/dna.dm

@@ -43,11 +43,11 @@ GLOBAL_LIST_INIT(total_uf_len_by_block, populate_total_uf_len_by_block())
 	///Stores the real name of the person who originally got this dna datum. Used primarily for changelings
 	var/real_name
 	///All mutations are from now on here
-	var/list/mutations = list()
+	var/list/mutations
 	///Temporary changes to the UE
-	var/list/temporary_mutations = list()
+	var/list/temporary_mutations
 	///For temporary name/ui/ue/blood_type modifications
-	var/list/previous = list()
+	var/list/previous
 	var/mob/living/holder
 	///List of which mutations this carbon has and its assigned block
 	var/mutation_index[DNA_MUTATION_BLOCKS]
@@ -76,9 +76,9 @@ GLOBAL_LIST_INIT(total_uf_len_by_block, populate_total_uf_len_by_block())
 
 	QDEL_NULL(species)
 
-	mutations.Cut() //This only references mutations, just dereference.
-	temporary_mutations.Cut() //^
-	previous.Cut() //^
+	LAZYNULL(mutations) //This only references mutations, just dereference.
+	LAZYNULL(temporary_mutations) //^
+	LAZYNULL(previous) //^
 
 	return ..()
 
@@ -89,7 +89,7 @@ GLOBAL_LIST_INIT(total_uf_len_by_block, populate_total_uf_len_by_block())
 	new_dna.unique_features = unique_features
 	new_dna.features = features.Copy()
 	new_dna.real_name = real_name
-	new_dna.temporary_mutations = temporary_mutations.Copy()
+	new_dna.temporary_mutations = LAZYLISTDUPLICATE(temporary_mutations)
 	new_dna.mutation_index = mutation_index
 	new_dna.default_mutation_genes = default_mutation_genes
 	//if the new DNA has a holder, transform them immediately, otherwise save it

code/datums/dog_fashion.dm

@@ -4,13 +4,13 @@
 	///Description modifier for the dog that we're dressing up
 	var/desc = null
 	///Hearable emotes modifier for the dog that we're dressing up
-	var/list/emote_hear = list()
+	var/list/emote_hear
 	///Visible emotes modifier for the dog that we're dressing up
-	var/list/emote_see = list()
+	var/list/emote_see
 	///Speech modifier for the dog that we're dressing up
-	var/list/speak = list()
+	var/list/speak
 	///Speech verb modifier for the dog that we're dressing up
-	var/list/speak_emote = list()
+	var/list/speak_emote
 
 	// This isn't applied to the dog, but stores the icon_state of the
 	// sprite that the associated item uses
@@ -41,16 +41,16 @@
 		dressup_doggy.name = name
 	if(desc)
 		dressup_doggy.desc = desc
-	if(length(speak_emote))
+	if(LAZYLEN(speak_emote))
 		dressup_doggy.speak_emote = string_list(speak_emote)
 
 ///Applies random speech modifiers to the dog
 /datum/dog_fashion/proc/apply_to_speech(datum/ai_planning_subtree/random_speech/speech)
-	if(length(emote_see))
+	if(LAZYLEN(emote_see))
 		speech.emote_see = string_list(emote_see)
-	if(length(emote_hear))
+	if(LAZYLEN(emote_hear))
 		speech.emote_hear = string_list(emote_hear)
-	if(length(speak))
+	if(LAZYLEN(speak))
 		speech.speak = string_list(speak)
 
 /**
@@ -237,7 +237,7 @@
 	name = "Butter %REAL_NAME%"
 	desc = "%NAME%. %CAPITAL_REAL_NAME% with the butter. %NAME%. %CAPITAL_REAL_NAME% with a butter on 'em."
 	obj_icon_state = "butter"
-	speak = list() //they're very patient and focused on holding the butter on 'em
+	speak = null //they're very patient and focused on holding the butter on 'em
 	emote_see = list("shakes a little.", "looks around.")
 	emote_hear = list("licks a trickle of the butter up.", "smiles.")
 

code/datums/embedding.dm

@@ -420,7 +420,7 @@
 	if (user.zone_selected != owner_limb.body_zone || (tool.tool_behaviour != TOOL_HEMOSTAT && tool.tool_behaviour != TOOL_WIRECUTTER))
 		return
 
-	if (parent != owner_limb.embedded_objects[1]) // Don't pluck everything at the same time
+	if (parent != LAZYACCESS(owner_limb.embedded_objects, 1)) // Don't pluck everything at the same time
 		return
 
 	// Ensure that we can actually

code/datums/mutations/_mutations.dm

@@ -129,7 +129,7 @@
 		return FALSE
 	owner = acquirer
 	dna = acquirer.dna
-	dna.mutations += src
+	LAZYADD(dna.mutations, src)
 	SEND_SIGNAL(src, COMSIG_MUTATION_GAINED, acquirer)
 	if(text_gain_indication)
 		to_chat(owner, text_gain_indication)
@@ -153,7 +153,7 @@
 	return
 
 /datum/mutation/proc/on_losing(mob/living/carbon/human/owner)
-	if(!istype(owner) || !(owner.dna.mutations.Remove(src)))
+	if(!istype(owner) || !(owner.dna.mutations?.Remove(src)))
 		return TRUE
 	. = FALSE
 	SEND_SIGNAL(src, COMSIG_MUTATION_LOST, owner)

code/datums/storage/storage.dm

@@ -21,12 +21,12 @@
 	VAR_FINAL/atom/real_location
 
 	/// List of all the mobs currently viewing the contents of this storage.
-	VAR_PRIVATE/list/mob/is_using = list()
+	VAR_PRIVATE/list/mob/is_using
 
 	///The type of storage interface this datum uses.
 	var/datum/storage_interface/storage_type = /datum/storage_interface
 	/// Associated list that keeps track of all storage UI datums per person.
-	VAR_PRIVATE/list/datum/storage_interface/storage_interfaces = null
+	VAR_PRIVATE/list/datum/storage_interface/storage_interfaces
 
 	/// Typecache of items that can be inserted into this storage.
 	/// By default, all item types can be inserted (assuming other conditions are met).
@@ -158,7 +158,7 @@
 	for(var/mob/person as anything in is_using)
 		hide_contents(person)
 
-	is_using.Cut()
+	LAZYNULL(is_using)
 	QDEL_LIST_ASSOC_VAL(storage_interfaces)
 
 	parent = null
@@ -1084,7 +1084,7 @@ GLOBAL_LIST_EMPTY(cached_storage_typecaches)
 
 	orient_storage()
 
-	is_using |= to_show
+	LAZYOR(is_using, to_show)
 
 	to_show.hud_used.open_containers |= storage_interfaces[to_show].list_ui_elements()
 	to_show.client.screen |= storage_interfaces[to_show].list_ui_elements()
@@ -1103,14 +1103,14 @@ GLOBAL_LIST_EMPTY(cached_storage_typecaches)
 	if(to_hide.active_storage == src)
 		to_hide.active_storage = null
 
-	if(!length(is_using) && ismovable(real_location))
+	if(!LAZYLEN(is_using) && ismovable(real_location))
 		var/atom/movable/movable_loc = real_location
 		movable_loc.lose_active_storage(src)
 
-	if (!length(storage_interfaces) || isnull(storage_interfaces[to_hide]))
+	if (!LAZYLEN(storage_interfaces) || isnull(storage_interfaces[to_hide]))
 		return TRUE
 
-	is_using -= to_hide
+	LAZYREMOVE(is_using, to_hide)
 
 	if(to_hide.client)
 		to_hide.client.screen -= storage_interfaces[to_hide].list_ui_elements()

code/game/atom/_atom.dm

@@ -346,8 +346,8 @@
 /atom/proc/on_craft_completion(list/components, datum/crafting_recipe/current_recipe, atom/crafter)
 	SHOULD_CALL_PARENT(TRUE)
 	SEND_SIGNAL(src, COMSIG_ATOM_ON_CRAFT, components, current_recipe)
-	var/list/remaining_parts = current_recipe?.parts?.Copy()
-	var/list/parts_by_type = remaining_parts?.Copy()
+	var/list/remaining_parts = LAZYLISTDUPLICATE(current_recipe?.parts)
+	var/list/parts_by_type = LAZYLISTDUPLICATE(remaining_parts)
 	for(var/parttype in parts_by_type) //necessary for our is_type_in_list() call with the zebra arg set to true
 		parts_by_type[parttype] = parttype
 	for(var/atom/movable/movable as anything in components) // machinery or structure objects in the list are guaranteed to be used up. We only check items.

code/game/atom/atoms_initializing_EXPENSIVE.dm

@@ -122,6 +122,9 @@
 
 	SET_PLANE_IMPLICIT(src, plane)
 
+	if(LAZYLEN(hud_possible))
+		hud_possible = string_assoc_list(hud_possible)
+
 	if(greyscale_config && greyscale_colors) //we'll check again at item/init for inhand/belt/worn configs.
 		update_greyscale()
 

code/game/objects/items/cards_ids.dm

@@ -165,7 +165,7 @@
 
 /obj/item/card/id/Destroy()
 	if (registered_account)
-		registered_account.bank_cards -= src
+		LAZYREMOVE(registered_account.bank_cards, src)
 	if (my_store)
 		QDEL_NULL(my_store)
 	if (isitem(loc))
@@ -768,9 +768,9 @@
 		to_chat(user, span_warning("The account ID number provided is invalid."))
 		return FALSE
 	if(old_account)
-		old_account.bank_cards -= src
+		LAZYREMOVE(old_account.bank_cards, src)
 		account.account_balance += old_account.account_balance
-	account.bank_cards += src
+	LAZYADD(account.bank_cards, src)
 	registered_account = account
 	to_chat(user, span_notice("The provided account has been linked to this ID card. It contains [account.account_balance] [MONEY_NAME]."))
 	return TRUE
@@ -1095,11 +1095,10 @@
 
 /obj/item/card/id/departmental_budget/Initialize(mapload)
 	. = ..()
-	var/datum/bank_account/B = SSeconomy.get_dep_account(department_ID)
-	if(B)
-		registered_account = B
-		if(!B.bank_cards.Find(src))
-			B.bank_cards += src
+	var/datum/bank_account/department_account = SSeconomy.get_dep_account(department_ID)
+	if(department_account)
+		registered_account = department_account
+		LAZYOR(department_account.bank_cards, src)
 		name = "departmental card ([department_name])"
 		desc = "Provides access to the [department_name]."
 	SSeconomy.dep_cards += src
@@ -1972,7 +1971,7 @@
 
 	var/datum/bank_account/account = SSeconomy.bank_accounts_by_id["[owner.account_id]"]
 	if(account)
-		account.bank_cards += src
+		LAZYADD(account.bank_cards, src)
 		registered_account = account
 		to_chat(user, span_notice("Your account number has been automatically assigned."))
 

code/game/objects/items/devices/scanners/autopsy_scanner.dm

@@ -91,7 +91,7 @@
 			dmgreport += "</tr>"
 			dmgreport += "<tr><td colspan=6>&rdsh; Physical trauma: <u>Dismembered</u></td></tr>"
 			continue
-		var/has_any_embeds = length(limb.embedded_objects) >= 1
+		var/has_any_embeds = LAZYLEN(limb.embedded_objects) >= 1
 		var/has_any_wounds = length(limb.wounds) >= 1
 		dmgreport += "<tr>"
 		dmgreport += "<td><b>[capitalize(limb.name)]:</b></td>"

code/game/objects/items/devices/scanners/health_analyzer.dm

@@ -252,7 +252,7 @@
 						dmgreport += "</tr>"
 						dmgreport += "<tr><td colspan=6><span class='alert ml-2'>&rdsh; Physical trauma: [conditional_tooltip("Dismembered", "Reattach or replace surgically.", tochat)]</span></td></tr>"
 						continue
-					var/has_any_embeds = length(limb.embedded_objects) >= 1
+					var/has_any_embeds = LAZYLEN(limb.embedded_objects) >= 1
 					var/has_any_wounds = length(limb.wounds) >= 1
 					var/is_damaged = limb.burn_dam > 0 || limb.brute_dam > 0
 					if(!is_damaged && (zone != BODY_ZONE_CHEST || (tox_loss <= 0 && oxy_loss <= 0)) && !has_any_embeds && !has_any_wounds)

code/game/objects/items/dna_injector.dm

@@ -120,6 +120,7 @@
 		addtimer(CALLBACK(target.dna, TYPE_PROC_REF(/datum/dna, remove_mutation), mutation, MUTATION_SOURCE_TIMED_INJECTOR), duration)
 	if(fields)
 		if(fields["name"] && fields["UE"] && fields["blood_type"])
+			LAZYINITLIST(target.dna.previous)
 			if(!target.dna.previous["name"])
 				target.dna.previous["name"] = target.real_name
 			if(!target.dna.previous["UE"])
@@ -130,17 +131,19 @@
 			target.dna.unique_enzymes = fields["UE"]
 			target.name = target.real_name
 			target.set_blood_type(fields["blood_type"])
-			target.dna.temporary_mutations[UE_CHANGED] = endtime
+			LAZYSET(target.dna.temporary_mutations, UE_CHANGED, endtime)
 		if(fields["UI"]) //UI+UE
+			LAZYINITLIST(target.dna.previous)
 			if(!target.dna.previous["UI"])
 				target.dna.previous["UI"] = target.dna.unique_identity
 			target.dna.unique_identity = merge_text(target.dna.unique_identity, fields["UI"])
-			target.dna.temporary_mutations[UI_CHANGED] = endtime
+			LAZYSET(target.dna.temporary_mutations, UI_CHANGED, endtime)
 		if(fields["UF"]) //UI+UE
+			LAZYINITLIST(target.dna.previous)
 			if(!target.dna.previous["UF"])
 				target.dna.previous["UF"] = target.dna.unique_features
 			target.dna.unique_features = merge_text(target.dna.unique_features, fields["UF"])
-			target.dna.temporary_mutations[UF_CHANGED] = endtime
+			LAZYSET(target.dna.temporary_mutations, UF_CHANGED, endtime)
 		if(fields["UI"] || fields["UF"])
 			target.updateappearance(mutcolor_update = TRUE, mutations_overlay_update = TRUE)
 	return TRUE

code/modules/cargo/markets/market_uplink.dm

@@ -162,7 +162,7 @@
 	. = ..()
 	ADD_TRAIT(src, TRAIT_CONTRABAND, INNATE_TRAIT)
 
-/datum/crafting_recipe/blackmarket_uplink
+/datum/crafting_recipe/radio_containing/blackmarket_uplink
 	name = "Black Market Uplink"
 	result = /obj/item/market_uplink/blackmarket
 	time = 3 SECONDS
@@ -175,8 +175,3 @@
 		/obj/item/analyzer = 1
 	)
 	category = CAT_EQUIPMENT
-
-/datum/crafting_recipe/blackmarket_uplink/New()
-	..()
-	blacklist |= typesof(/obj/item/radio/headset) // because we got shit like /obj/item/radio/off ... WHY!?!
-	blacklist |= typesof(/obj/item/radio/intercom)

code/modules/clothing/chameleon/generic_chameleon_clothing.dm

@@ -193,12 +193,13 @@ do { \
 	clothing_traits = list(TRAIT_VOICE_MATCHES_ID)
 
 /obj/item/clothing/mask/chameleon/attack_self(mob/user)
-	var/was_on = (TRAIT_VOICE_MATCHES_ID in clothing_traits)
-	if(was_on)
-		attach_clothing_traits(TRAIT_VOICE_MATCHES_ID)
-	else
+	var/on = (TRAIT_VOICE_MATCHES_ID in clothing_traits)
+	if(on)
 		detach_clothing_traits(TRAIT_VOICE_MATCHES_ID)
-	to_chat(user, span_notice("The voice changer is now [was_on ? "off" : "on"]!"))
+	else
+		attach_clothing_traits(TRAIT_VOICE_MATCHES_ID)
+	on = !on
+	to_chat(user, span_notice("The voice changer is now [on ? "on" : "off"]!"))
 
 /obj/item/clothing/mask/chameleon/broken
 

code/modules/clothing/clothing.dm

@@ -64,6 +64,8 @@
 /obj/item/clothing/Initialize(mapload)
 	if(clothing_flags & VOICEBOX_TOGGLABLE)
 		actions_types += list(/datum/action/item_action/toggle_voice_box)
+	if(LAZYLEN(clothing_traits))
+		clothing_traits = string_list(clothing_traits)
 	. = ..()
 	AddElement(/datum/element/venue_price, FOOD_PRICE_CHEAP)
 	if(can_be_bloody && ((body_parts_covered & FEET) || (flags_inv & HIDESHOES)))
@@ -286,7 +288,11 @@
 	if(!islist(trait_or_traits))
 		trait_or_traits = list(trait_or_traits)
 
+	// Use a temporary list so we don't mutate the cached version
+	clothing_traits = LAZYLISTDUPLICATE(clothing_traits)
 	LAZYOR(clothing_traits, trait_or_traits)
+	if(clothing_traits) // because we might be null
+		clothing_traits = string_list(clothing_traits)
 	var/mob/wearer = loc
 	if(istype(wearer) && (wearer.get_slot_by_item(src) & slot_flags))
 		for(var/new_trait in trait_or_traits)
@@ -303,7 +309,11 @@
 	if(!islist(trait_or_traits))
 		trait_or_traits = list(trait_or_traits)
 
+	// Use a temporary list so we don't mutate the cached version
+	clothing_traits = LAZYLISTDUPLICATE(clothing_traits)
 	LAZYREMOVE(clothing_traits, trait_or_traits)
+	if(clothing_traits) // because we might be null
+		clothing_traits = string_list(clothing_traits)
 	var/mob/wearer = loc
 	if(istype(wearer))
 		for(var/new_trait in trait_or_traits)

code/modules/clothing/glasses/hud.dm

@@ -270,7 +270,7 @@
 /obj/item/clothing/glasses/hud/toggle/thermal/attack_self(mob/user)
 	..()
 	var/hud_type
-	if (!isnull(clothing_traits) && clothing_traits.len)
+	if (LAZYLEN(clothing_traits))
 		hud_type = clothing_traits[1]
 	switch (hud_type)
 		if (TRAIT_MEDICAL_HUD)

code/modules/clothing/gloves/color.dm

@@ -12,7 +12,7 @@
 
 /obj/item/clothing/gloves/color/black/Initialize(mapload)
 	. = ..()
-	var/static/list/slapcraft_recipe_list = list(/datum/crafting_recipe/radiogloves)
+	var/static/list/slapcraft_recipe_list = list(/datum/crafting_recipe/radio_containing/radiogloves)
 
 	AddElement(
 		/datum/element/slapcrafting,\

code/modules/economy/account.dm

@@ -16,7 +16,7 @@
 	///The job datum of the account owner.
 	var/datum/job/account_job
 	///List of the physical ID card objects that are associated with this bank_account
-	var/list/bank_cards = list()
+	var/list/bank_cards
 	///Should this ID be added to the global list of accounts? If true, will be subject to station-bound economy effects as well as income.
 	var/add_to_accounts = TRUE
 	///The Unique ID number code associated with the owner's bank account, assigned at round start.
@@ -34,7 +34,7 @@
 	///A special semi-tandom token for tranfering money from NT pay app
 	var/pay_token
 	///List with a transaction history for NT pay app
-	var/list/transaction_history = list()
+	var/list/transaction_history
 	///A lazylist of coupons redeemed with the Coupon Master pda app associated with this account.
 	var/list/redeemed_coupons
 	/// How many paychecks to skip when payday is called.
@@ -232,7 +232,7 @@
  * * force - if TRUE ignore checks on client and client prefernces.
  */
 /datum/bank_account/proc/bank_card_talk(message, force)
-	if(!message || !bank_cards.len)
+	if(!message || !LAZYLEN(bank_cards))
 		return
 	for(var/obj/card in bank_cards)
 		var/icon_source = card
@@ -344,12 +344,12 @@
  * * reason - The reason of interact with balance, for example, "Bought chips" or "Payday".
  */
 /datum/bank_account/proc/add_log_to_history(adjusted_money, reason)
-	if(transaction_history.len >= 20)
+	if(LAZYLEN(transaction_history) >= 20)
 		transaction_history.Cut(1,2)
 
-	transaction_history += list(list(
+	LAZYADD(transaction_history, list(list(
 		"adjusted_money" = adjusted_money,
 		"reason" = reason,
-	))
+	)))
 
 #undef DUMPTIME

code/modules/experisci/experiment/experiments.dm

@@ -348,7 +348,7 @@
 	. = ..()
 	if (!.)
 		return
-	if(!check.dna.mutations.len)
+	if(!LAZYLEN(check.dna.mutations))
 		return FALSE
 	return TRUE
 

code/modules/food_and_drinks/recipes/tablecraft/recipes_guide.dm

@@ -52,7 +52,7 @@
  */
 /datum/crafting_recipe/food/reaction/proc/setup_chemical_reaction_details(datum/chemical_reaction/chemical_reaction)
 	reqs = chemical_reaction.required_reagents?.Copy()
-	chem_catalysts = chemical_reaction.required_catalysts?.Copy()
+	chem_catalysts = LAZYLISTDUPLICATE(chemical_reaction.required_catalysts)
 	if(isnull(result) && length(chemical_reaction.results))
 		result = chemical_reaction.results[1]
 		result_amount = chemical_reaction.results[result]

code/modules/jobs/job_types/_job.dm

@@ -406,7 +406,7 @@
 
 		if(account && account.account_id == equipped.account_id)
 			card.registered_account = account
-			account.bank_cards += card
+			LAZYADD(account.bank_cards, card)
 
 		equipped.update_ID_card()
 

code/modules/jobs/job_types/station_trait/cargo_gorilla.dm

@@ -41,7 +41,7 @@
 	gorilla_id.registered_name = spawned.name
 	gorilla_id.update_label()
 	gorilla_id.registered_account = bank_account
-	bank_account.bank_cards += gorilla_id
+	LAZYADD(bank_account.bank_cards, gorilla_id)
 	spawned.put_in_hands(gorilla_id, del_on_fail = TRUE)
 
 	to_chat(spawned, span_boldnotice("You are Cargorilla, a pacifist friend of the station and carrier of freight."))

code/modules/mob/dead/new_player/new_player.dm

@@ -6,7 +6,6 @@
 	density = FALSE
 	stat = DEAD
 	hud_type = /datum/hud/new_player
-	hud_possible = list()
 
 	/// String Values tied to Defines that state whether the new_player is ready to play or not.
 	/// Do try your best to compare this value directly against the defines for certainty but helper procs do exist in bulkier situations.

code/modules/mob/living/basic/basic.dm

@@ -51,7 +51,7 @@
 	var/list/damage_coeff = list(BRUTE = 1, BURN = 1, TOX = 1, STAMINA = 1, OXY = 1)
 
 	///Verbs used for speaking e.g. "Says" or "Chitters". This can be elementized
-	var/list/speak_emote = list()
+	var/list/speak_emote
 
 	///When someone interacts with the simple animal.
 	///Help-intent verb in present continuous tense.
@@ -120,8 +120,9 @@
 	apply_target_randomisation()
 	make_stamina_slowable()
 
-	if(speak_emote)
+	if(LAZYLEN(speak_emote))
 		speak_emote = string_list(speak_emote)
+	damage_coeff = string_assoc_list(damage_coeff)
 
 	///We need to wait for SSair to be initialized before we can check atmos/temp requirements.
 	if(PERFORM_ALL_TESTS(focus_only/atmos_and_temp_requirements) && mapload && !SSair.initialized)

code/modules/mob/living/basic/bots/cleanbot/cleanbot.dm

@@ -161,9 +161,9 @@
 
 /mob/living/basic/bot/cleanbot/Entered(atom/movable/arrived, atom/old_loc, list/atom/old_locs)
 	. = ..()
-	if(istype(arrived, /obj/item/reagent_containers/cup/bucket) && isnull(build_bucket))
+	if(istype(arrived, /obj/item/reagent_containers/cup/bucket))
+		QDEL_NULL(build_bucket)
 		build_bucket = arrived
-		return
 
 	if(istype(arrived, /obj/item/mop) && isnull(our_mop))
 		our_mop = arrived
@@ -208,7 +208,7 @@
 
 /mob/living/basic/bot/cleanbot/explode()
 	var/atom/drop_loc = drop_location()
-	build_bucket.forceMove(drop_loc)
+	build_bucket?.forceMove(drop_loc)
 	new /obj/item/assembly/prox_sensor(drop_loc)
 	if(weapon)
 		weapon.force = initial(weapon.force)
@@ -256,11 +256,6 @@
 	GLOB.janitor_devices -= src
 	return ..()
 
-/mob/living/basic/bot/cleanbot/proc/apply_custom_bucket(obj/item/custom_bucket)
-	if(!isnull(build_bucket))
-		QDEL_NULL(build_bucket)
-	custom_bucket.forceMove(src)
-
 /mob/living/basic/bot/cleanbot/proc/on_attack_by(datum/source, obj/item/used_item, mob/living/user)
 	SIGNAL_HANDLER
 	if(!istype(used_item, /obj/item/knife) || user.combat_mode)

code/modules/mob/living/basic/guardian/guardian_types/protector.dm

@@ -71,7 +71,9 @@
 	/// Overlay for our protection shield.
 	var/mutable_appearance/shield_overlay
 	/// Damage coefficients when shielded
-	var/list/shielded_damage = list(BRUTE = 0.05, BURN = 0.05, TOX = 0.05, STAMINA = 0, OXY = 0.05)
+	var/static/list/shielded_damage = list(BRUTE = 0.05, BURN = 0.05, TOX = 0.05, STAMINA = 0, OXY = 0.05)
+	// What the damage coefficients were previously
+	var/list/original_damage_coeff
 
 /datum/status_effect/protector_shield/on_apply()
 	if (isguardian(owner))
@@ -86,6 +88,7 @@
 
 	if (isbasicmob(owner)) // Better hope you are or this status is doing basically nothing useful for you
 		var/mob/living/basic/basic_owner = owner
+		original_damage_coeff = basic_owner.damage_coeff
 		basic_owner.damage_coeff = shielded_damage
 
 	to_chat(owner, span_bolddanger("You enter protection mode."))
@@ -101,7 +104,7 @@
 
 	if (isbasicmob(owner))
 		var/mob/living/basic/basic_owner = owner
-		basic_owner.damage_coeff = initial(basic_owner.damage_coeff)
+		basic_owner.damage_coeff = original_damage_coeff
 
 	to_chat(owner, span_bolddanger("You return to your normal mode."))
 	UnregisterSignal(owner, list(COMSIG_ATOM_UPDATE_OVERLAYS) + COMSIG_LIVING_ADJUST_STANDARD_DAMAGE_TYPES)

code/modules/mob/living/basic/ruin_defender/mimic/mimic_ai.dm

@@ -50,7 +50,7 @@
 
 /datum/ai_planning_subtree/random_speech/when_has_target/mimic_machine
 	speech_chance = 7
-	emote_hear = list()
+	emote_hear = null
 	speak = list(
 		"HUMANS ARE IMPERFECT!",
 		"YOU SHALL BE ASSIMILATED!",

code/modules/mob/living/carbon/life.dm

@@ -530,24 +530,26 @@
 			disease.stage_act(seconds_per_tick)
 
 /mob/living/carbon/handle_mutations(time_since_irradiated, seconds_per_tick)
-	if(!dna?.temporary_mutations.len)
+	if(!LAZYLEN(dna?.temporary_mutations))
 		return
 
-	for(var/mut in dna.temporary_mutations)
-		if(dna.temporary_mutations[mut] < world.time)
+	for(var/mut, mut_data in dna.temporary_mutations)
+		if(mut_data < world.time)
+			if(!LAZYLEN(dna.previous))
+				continue
 			if(mut == UI_CHANGED)
 				if(dna.previous["UI"])
 					dna.unique_identity = merge_text(dna.unique_identity,dna.previous["UI"])
 					updateappearance(mutations_overlay_update=1)
 					dna.previous.Remove("UI")
-				dna.temporary_mutations.Remove(mut)
+				LAZYREMOVE(dna.temporary_mutations, mut)
 				continue
 			if(mut == UF_CHANGED)
 				if(dna.previous["UF"])
 					dna.unique_features = merge_text(dna.unique_features,dna.previous["UF"])
 					updateappearance(mutcolor_update=1, mutations_overlay_update=1)
 					dna.previous.Remove("UF")
-				dna.temporary_mutations.Remove(mut)
+				LAZYREMOVE(dna.temporary_mutations, mut)
 				continue
 			if(mut == UE_CHANGED)
 				if(dna.previous["name"])
@@ -560,7 +562,7 @@
 				if(dna.previous["blood_type"])
 					set_blood_type(dna.previous["blood_type"])
 					dna.previous.Remove("blood_type")
-				dna.temporary_mutations.Remove(mut)
+				LAZYREMOVE(dna.temporary_mutations, mut)
 				continue
 
 /**

code/modules/mob/living/simple_animal/bot/construction.dm

@@ -74,7 +74,7 @@
 	if(!can_finish_build(item_attached, user))
 		return
 	var/mob/living/basic/bot/cleanbot/bot = new(drop_location())
-	bot.apply_custom_bucket(bucket_obj)
+	bucket_obj.forceMove(bot)
 	bot.name = created_name
 	bot.robot_arm = item_attached.type
 	to_chat(user, span_notice("You add [item_attached] to [src]. Beep boop!"))

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

@@ -73,8 +73,6 @@
 	var/search_objects_timer_id
 	///The delay between being attacked and gaining our old search_objects value back
 	var/search_objects_regain_time = 3 SECONDS
-	///A typecache of objects types that will be checked against to attack, should we have search_objects enabled
-	var/list/wanted_objects = list()
 	///Mobs ignore mob/living targets with a stat lower than that of stat_attack. If set to DEAD, then they'll include corpses in their targets, if to HARD_CRIT they'll keep attacking until they kill, and so on.
 	var/stat_attack = CONSCIOUS
 	///Mobs with this set to TRUE will exclusively attack things defined by stat_attack, stat_attack DEAD means they will only attack corpses
@@ -86,17 +84,11 @@
 	//Attempting to call GET_TARGETS_FROM(mob) when this var is null will just return mob as a base
 	///all range/attack/etc. calculations should be done from the atom this weakrefs, useful for Vehicles and such.
 	var/datum/weakref/targets_from
-	///if true, equivalent to having a wanted_objects list containing ALL objects.
-	var/attack_all_objects = FALSE
 	///id for a timer to call LoseTarget(), used to stop mobs fixating on a target they can't reach
 	var/lose_patience_timer_id
 	///30 seconds by default, so there's no major changes to AI behaviour, beyond actually bailing if stuck forever
 	var/lose_patience_timeout = 30 SECONDS
 
-/mob/living/simple_animal/hostile/Initialize(mapload)
-	. = ..()
-	wanted_objects = typecacheof(wanted_objects)
-
 /mob/living/simple_animal/hostile/Destroy()
 	//We can't use losetarget here because fucking cursed blobs override it to do nothing the motherfuckers
 	GiveTarget(null)
@@ -295,10 +287,6 @@
 				return FALSE
 			return TRUE
 
-	if(isobj(the_target))
-		if(attack_all_objects || is_type_in_typecache(the_target, wanted_objects))
-			return TRUE
-
 	return FALSE
 
 /mob/living/simple_animal/hostile/proc/GiveTarget(new_target)//Step 4, give us our selected target

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

@@ -17,14 +17,14 @@
 	///Flip the sprite upside down on death. Mostly here for things lacking custom dead sprites.
 	var/flip_on_death = FALSE
 
-	var/list/speak = list()
+	var/list/speak
 	///Emotes while speaking IE: `Ian [emote], [text]` -- `Ian barks, "WOOF!".` Spoken text is generated from the speak variable.
-	var/list/speak_emote = list()
+	var/list/speak_emote
 	var/speak_chance = 0
 	///Hearable emotes
-	var/list/emote_hear = list()
+	var/list/emote_hear
 	///Unlike speak_emote, the list of things in this variable only show by themselves with no spoken text. IE: Ian barks, Ian yaps
-	var/list/emote_see = list()
+	var/list/emote_see
 
 	///ticks up every time `handle_automated_movement()` is called, which is every 2 seconds at the time of documenting. 1  turns per move is 1 movement every 2 seconds.
 	var/turns_per_move = 1
@@ -177,16 +177,15 @@
 		add_traits(weather_immunities, ROUNDSTART_TRAIT)
 	if (environment_smash >= ENVIRONMENT_SMASH_WALLS)
 		AddElement(/datum/element/wall_smasher, strength_flag = environment_smash)
-	if(speak)
+	if(LAZYLEN(speak))
 		speak = string_list(speak)
-	if(speak_emote)
+	if(LAZYLEN(speak_emote))
 		speak_emote = string_list(speak_emote)
-	if(emote_hear)
+	if(LAZYLEN(emote_hear))
 		emote_hear = string_list(emote_hear)
-	if(emote_see)
-		emote_see = string_list(emote_hear)
-	if(damage_coeff)
-		damage_coeff = string_assoc_list(damage_coeff)
+	if(LAZYLEN(emote_see))
+		emote_see = string_list(emote_see)
+	damage_coeff = string_assoc_list(damage_coeff)
 	if(footstep_type)
 		AddElement(/datum/element/footstep, footstep_type)
 	if(isnull(unsuitable_cold_damage))

code/modules/mob/mob.dm

@@ -181,7 +181,7 @@
  * Goes through hud_possible list and adds the images to the hud_list variable (if not already cached)
  */
 /atom/proc/prepare_huds()
-	if(hud_list) // I choose to be lienient about people calling this proc more then once
+	if(hud_list) // I choose to be lenient about people calling this proc more then once
 		return
 	hud_list = list()
 	for(var/hud in hud_possible)

code/modules/modular_computers/computers/item/role_tablet_presets.dm

@@ -501,7 +501,7 @@
 	var/datum/computer_file/program/themeify/theme_app = locate() in stored_files
 	if(theme_app)
 		for(var/theme_key in GLOB.pda_name_to_theme - GLOB.default_pda_themes)
-			theme_app.imported_themes += theme_key
+			LAZYADD(theme_app.imported_themes, theme_key)
 
 /obj/item/modular_computer/pda/clear/get_messenger_ending()
 	return "Sent from my crystal PDA"

code/modules/modular_computers/file_system/program.dm

@@ -14,9 +14,9 @@
 	var/power_cell_use = PROGRAM_BASIC_CELL_USE
 	///List of required accesses to *run* the program. Any match will do.
 	///This also acts as download_access if that is not set, making this more draconic and restrictive.
-	var/list/run_access = list()
+	var/list/run_access
 	///List of required access to download or file host the program. Any match will do.
-	var/list/download_access = list()
+	var/list/download_access
 	/// User-friendly name of this program.
 	var/filedesc = "Unknown Program"
 	/// Short description of this program's function.
@@ -51,6 +51,10 @@
 
 /datum/computer_file/program/New()
 	..()
+	if(LAZYLEN(run_access))
+		run_access = string_list(run_access)
+	if(LAZYLEN(download_access))
+		download_access = string_list(download_access)
 	///We need to ensure that different programs (subtypes mostly) won't try to load in the same circuit comps into the shell or usb port of the modpc.
 	if(circuit_comp_type && initial(circuit_comp_type.associated_program) != type)
 		stack_trace("circuit comp type mismatch: [type] has circuit comp type \[[circuit_comp_type]\], while \[[circuit_comp_type]\] has associated program \[[initial(circuit_comp_type.associated_program)]\].")

code/modules/modular_computers/file_system/programs/borg_monitor.dm

@@ -174,7 +174,7 @@
 	program_open_overlay = "generic"
 	extended_desc = "This program allows for remote monitoring of mission-assigned cyborgs."
 	program_flags = PROGRAM_ON_SYNDINET_STORE
-	download_access = list()
+	download_access = null
 	circuit_comp_type = /obj/item/circuit_component/mod_program/borg_monitor/syndie
 
 /datum/computer_file/program/borg_monitor/syndicate/evaluate_borg(mob/living/silicon/robot/R)

code/modules/modular_computers/file_system/programs/dept_order.dm

@@ -49,7 +49,7 @@ GLOBAL_VAR(department_cd_override)
 	linked_department = department
 	var/datum/job_department/linked_department_real = SSjob.get_department_type(linked_department)
 	// Heads of staff can download
-	download_access |= linked_department_real.head_of_staff_access
+	LAZYOR(download_access, linked_department_real.head_of_staff_access)
 	// Heads of staff + anyone in the dept can run it
 	use_access |= linked_department_real.head_of_staff_access
 	use_access |= linked_department_real.department_access
@@ -164,7 +164,7 @@ GLOBAL_VAR(department_cd_override)
 	if(action == "override_order")
 		if(isnull(department_order) || !(department_order in SSshuttle.shopping_list))
 			return TRUE
-		if(length(download_access & id_card_access) <= 0)
+		if(LAZYLEN(download_access & id_card_access) <= 0)
 			computer.physical.balloon_alert(orderer, "requires head of staff access!")
 			playsound(computer, 'sound/machines/buzz/buzz-sigh.ogg', 30, TRUE)
 			return TRUE

code/modules/modular_computers/file_system/programs/maintenance/themes.dm

@@ -20,7 +20,7 @@
 	if(!theme_app)
 		return FALSE
 	//don't get the same one twice
-	if(theme_app.imported_themes.Find(theme_name))
+	if(LAZYFIND(theme_app.imported_themes, theme_name))
 		return FALSE
 	return TRUE
 
@@ -30,7 +30,7 @@
 	//add the theme to the computer and increase its size to match
 	var/datum/computer_file/program/themeify/theme_app = locate() in computer.stored_files
 	if(theme_app)
-		theme_app.imported_themes += theme_name
+		LAZYADD(theme_app.imported_themes, theme_name)
 		theme_app.size += size
 		qdel(src)
 

code/modules/modular_computers/file_system/programs/messenger/messenger_program.dm

@@ -34,7 +34,7 @@
 	var/spam_mode = FALSE
 
 	/// An asssociative list of chats we have started, format: chatref -> pda_chat.
-	var/list/saved_chats = list()
+	var/list/saved_chats
 	/// Whose chatlogs we currently have open. If we are in the contacts list, this is null.
 	var/viewing_messages_of = null
 
@@ -74,7 +74,7 @@
 /datum/computer_file/program/messenger/proc/on_imprint_reset(sender)
 	SIGNAL_HANDLER
 	remove_messenger(src)
-	saved_chats = list()
+	LAZYNULL(saved_chats)
 	selected_image = null
 	viewing_messages_of = null
 
@@ -117,7 +117,7 @@
 		data |= photo.picture_name
 
 	if(viewing_messages_of in saved_chats)
-		var/datum/pda_chat/chat = saved_chats[viewing_messages_of]
+		var/datum/pda_chat/chat = LAZYACCESS(saved_chats, viewing_messages_of)
 		for(var/datum/pda_message/message as anything in chat.messages)
 			if(isnull(message.photo_name))
 				continue
@@ -180,13 +180,13 @@
 
 		if("PDA_viewMessages")
 			if(viewing_messages_of in saved_chats)
-				var/datum/pda_chat/chat = saved_chats[viewing_messages_of]
+				var/datum/pda_chat/chat = LAZYACCESS(saved_chats, viewing_messages_of)
 				chat.unread_messages = 0
 
 			viewing_messages_of = params["ref"]
 
 			if (viewing_messages_of in saved_chats)
-				var/datum/pda_chat/chat = saved_chats[viewing_messages_of]
+				var/datum/pda_chat/chat = LAZYACCESS(saved_chats, viewing_messages_of)
 				chat.visible_in_recents = TRUE
 
 			selected_image = null
@@ -198,7 +198,7 @@
 			if(!(target in saved_chats))
 				return FALSE
 
-			var/datum/pda_chat/chat = saved_chats[target]
+			var/datum/pda_chat/chat = LAZYACCESS(saved_chats, target)
 			chat.visible_in_recents = FALSE
 			if(viewing_messages_of == target)
 				viewing_messages_of = null
@@ -208,9 +208,9 @@
 			var/chat_ref = params["ref"]
 
 			if(chat_ref in saved_chats)
-				saved_chats.Remove(chat_ref)
+				LAZYREMOVE(saved_chats, chat_ref)
 			else if(isnull(chat_ref))
-				saved_chats = list()
+				LAZYNULL(saved_chats)
 
 			viewing_messages_of = null
 			return TRUE
@@ -240,7 +240,7 @@
 			if(!(target_chat_ref in saved_chats))
 				return FALSE
 
-			var/datum/pda_chat/chat = saved_chats[target_chat_ref]
+			var/datum/pda_chat/chat = LAZYACCESS(saved_chats, target_chat_ref)
 
 			chat.message_draft = message_draft
 
@@ -252,7 +252,7 @@
 			if(!(target_chat_ref in saved_chats))
 				return FALSE
 
-			var/datum/pda_chat/chat = saved_chats[target_chat_ref]
+			var/datum/pda_chat/chat = LAZYACCESS(saved_chats, target_chat_ref)
 			chat.unread_messages = 0
 
 			return TRUE
@@ -269,7 +269,7 @@
 			var/target = null
 
 			if(target_ref in saved_chats)
-				target = saved_chats[target_ref]
+				target = LAZYACCESS(saved_chats, target_ref)
 			else if(target_ref in GLOB.pda_messengers)
 				target = GLOB.pda_messengers[target_ref]
 			else
@@ -357,7 +357,7 @@
 			"job" = computer.saved_job,
 			"ref" = REF(src)
 		) : null)
-	data["saved_chats"] = chats_data
+	data["saved_chats"] = chats_data || list()
 	data["messengers"] = messengers
 	data["sort_by_job"] = sort_by_job
 	data["alert_silenced"] = alert_silenced
@@ -412,8 +412,8 @@
 	for(var/mc in get_messengers())
 		messenger_targets += mc
 
-	for(var/chatref in saved_chats)
-		var/datum/pda_chat/chat = saved_chats[chatref]
+	for(var/chatref, data in saved_chats)
+		var/datum/pda_chat/chat = data
 		if(!(chat.recipient?.reference in messenger_targets)) // if its in messenger_targets, it's valid
 			continue
 		messenger_targets -= chat.recipient.reference
@@ -443,14 +443,14 @@
 		new_chat.cached_job = job
 		new_chat.can_reply = FALSE
 
-	saved_chats[REF(new_chat)] = new_chat
+	LAZYSET(saved_chats, REF(new_chat), new_chat)
 
 	return new_chat
 
 /// Gets the chat by the recipient, either by their name or messenger ref
 /datum/computer_file/program/messenger/proc/find_chat_by_recipient(recipient, fake_user = FALSE)
-	for(var/chat_ref in saved_chats)
-		var/datum/pda_chat/chat = saved_chats[chat_ref]
+	for(var/chat_ref, data in saved_chats)
+		var/datum/pda_chat/chat = data
 		if(fake_user && chat.cached_name == recipient)
 			return chat
 		else if(chat.recipient?.reference == recipient)
@@ -752,7 +752,7 @@
 		if("message")
 			if(!(target_href in saved_chats))
 				return
-			quick_reply_prompt(usr, saved_chats[target_href])
+			quick_reply_prompt(usr, LAZYACCESS(saved_chats, target_href))
 
 		if("open")
 			if(target_href in saved_chats)

code/modules/modular_computers/file_system/programs/notepad.dm

@@ -9,7 +9,6 @@
 	program_icon = "book"
 	can_run_on_flags = PROGRAM_ALL
 	circuit_comp_type = /obj/item/circuit_component/mod_program/notepad
-
 	var/written_note = "Congratulations on your station upgrading to the new NtOS and Thinktronic based collaboration effort, \
 		bringing you the best in electronics and software since 2467!\n\
 		To help with navigation, we have provided the following definitions:\n\

code/modules/modular_computers/file_system/programs/nt_pay.dm

@@ -50,7 +50,7 @@
 		data["owner_token"] = current_user.pay_token
 		data["money"] = current_user.account_balance
 		data["wanted_token"] = wanted_token
-		data["transaction_list"] = current_user.transaction_history
+		data["transaction_list"] = current_user.transaction_history || list()
 
 	return data
 

code/modules/modular_computers/file_system/programs/secureye.dm

@@ -38,7 +38,7 @@
 	filename = "syndeye"
 	filedesc = "SyndEye"
 	extended_desc = "This program allows for illegal access to security camera networks."
-	download_access = list()
+	download_access = null
 	can_run_on_flags = PROGRAM_ALL
 	program_flags = PROGRAM_ON_SYNDINET_STORE | PROGRAM_UNIQUE_COPY
 

code/modules/modular_computers/file_system/programs/theme_selector.dm

@@ -10,7 +10,7 @@
 	program_icon = "paint-roller"
 
 	///List of all themes imported from maintenance apps.
-	var/list/imported_themes = list()
+	var/list/imported_themes
 
 /datum/computer_file/program/themeify/ui_data(mob/user)
 	var/list/data = list()
@@ -29,7 +29,7 @@
 			var/selected_theme = params["selected_theme"]
 			if( \
 				!GLOB.default_pda_themes.Find(selected_theme) && \
-				!imported_themes.Find(selected_theme) && \
+				!LAZYFIND(imported_themes, selected_theme) && \
 				!(computer.obj_flags & EMAGGED) \
 			)
 				return FALSE

code/modules/projectiles/guns/energy/laser.dm

@@ -16,7 +16,7 @@
 	// Only regular lasguns can be slapcrafted
 	if(type != /obj/item/gun/energy/laser)
 		return
-	var/static/list/slapcraft_recipe_list = list(/datum/crafting_recipe/xraylaser, /datum/crafting_recipe/hellgun, /datum/crafting_recipe/ioncarbine)
+	var/static/list/slapcraft_recipe_list = list(/datum/crafting_recipe/laser/xraylaser, /datum/crafting_recipe/laser/hellgun, /datum/crafting_recipe/laser/ioncarbine)
 	AddElement(
 		/datum/element/slapcrafting,\
 		slapcraft_recipes = slapcraft_recipe_list,\

code/modules/reagents/chemistry/reagents/medicine_reagents.dm

@@ -1274,7 +1274,8 @@
 	. = ..()
 	affected_mob.remove_status_effect(/datum/status_effect/jitter)
 	if(affected_mob.has_dna())
-		affected_mob.dna.remove_mutation_group(affected_mob.dna.mutations - affected_mob.dna.get_mutation(/datum/mutation/race), GLOB.standard_mutation_sources)
+		var/list/mutations = affected_mob.dna.mutations || list()
+		affected_mob.dna.remove_mutation_group(mutations - affected_mob.dna.get_mutation(/datum/mutation/race), GLOB.standard_mutation_sources)
 		affected_mob.dna.scrambled = FALSE
 
 /datum/reagent/medicine/antihol

code/modules/surgery/bodyparts/_bodyparts.dm

@@ -67,7 +67,7 @@
 	/// bitflag used to check which clothes cover this bodypart
 	var/body_part
 	/// List of obj/item's embedded inside us. Managed by embedded components, do not modify directly
-	var/list/embedded_objects = list()
+	var/list/embedded_objects
 	/// are we a hand? if so, which one!
 	var/held_index = 0
 	/// A speed modifier we apply to the owner when attached, if any. Positive numbers make it move slower, negative numbers make it move faster.
@@ -1395,14 +1395,14 @@
 	if(embed in embedded_objects) // go away
 		return
 	// We don't need to do anything with projectile embedding, because it will never reach this point
-	embedded_objects += embed
+	LAZYADD(embedded_objects, embed)
 	RegisterSignal(embed, COMSIG_ITEM_EMBEDDING_UPDATE, PROC_REF(embedded_object_changed))
 	refresh_bleed_rate()
 
 /// INTERNAL PROC, DO NOT USE
 /// Cleans up any attachment we have to the embedded object, removes it from our list
 /obj/item/bodypart/proc/_unembed_object(obj/item/unembed)
-	embedded_objects -= unembed
+	LAZYREMOVE(embedded_objects, unembed)
 	UnregisterSignal(unembed, COMSIG_ITEM_EMBEDDING_UPDATE)
 	refresh_bleed_rate()
 

code/modules/unit_tests/crafting.dm

@@ -48,17 +48,14 @@
 	//If it doesn't fail, then it was already handled, maybe through `unit_test_spawn_extras`
 	var/list/uncreatables_found
 
-	for(var/spawn_path in recipe.unit_test_spawn_extras)
-		var/amount = recipe.unit_test_spawn_extras[spawn_path]
+	for(var/spawn_path, amount in recipe.unit_test_spawn_extras)
 		if(ispath(spawn_path, /obj/item/stack))
 			new spawn_path(turf, /*new_amount =*/ amount, /*merge =*/ FALSE)
 			continue
 		for(var/index in 1 to amount)
 			new spawn_path(turf)
 
-	for(var/req_path in recipe.reqs) //spawn items and reagents
-		var/amount = recipe.reqs[req_path]
-
+	for(var/req_path, amount in recipe.reqs) //spawn items and reagents
 		if(ispath(req_path, /datum/reagent)) //it's a reagent
 			if(!bottomless_cup.reagents.has_reagent(req_path, amount))
 				bottomless_cup.reagents.add_reagent(req_path, amount + 1, no_react = TRUE)
@@ -76,8 +73,8 @@
 		for(var/iteration in 1 to amount)
 			new req_path(turf)
 
-	for(var/req_path in recipe.chem_catalysts) // spawn catalysts
-		var/amount = recipe.chem_catalysts[req_path]
+	for(var/req_path, chem_amount in recipe.chem_catalysts) // spawn catalysts
+		var/amount = chem_amount
 		if(!bottomless_cup.reagents.has_reagent(req_path, amount))
 			bottomless_cup.reagents.add_reagent(req_path, amount + 1, no_react = TRUE)