Moving wizard and spells into a modpack.

code/datums/extensions/abilities/abilities.dm

@@ -54,3 +54,7 @@
 		for(var/datum/ability_handler/handler in ability_handlers)
 			handler.refresh_login()
 
+/datum/extension/abilities/proc/refresh_element_positioning()
+	var/row = 0
+	for(var/datum/ability_handler/handler in ability_handlers)
+		row += handler.refresh_element_positioning(row)

code/datums/extensions/abilities/abilities_mob.dm

@@ -18,6 +18,7 @@
 		return FALSE
 	handler = new handler_type(abilities, src)
 	LAZYADD(abilities.ability_handlers, handler)
+	handler.finalize_ability_handler()
 	return handler
 
 /mob/proc/remove_ability_handler(handler_type)
@@ -31,3 +32,24 @@
 	if(!LAZYLEN(abilities.ability_handlers))
 		remove_extension(src, /datum/extension/abilities)
 	return TRUE
+
+/mob/living/proc/copy_abilities_from(mob/living/donor)
+	var/datum/extension/abilities/abilities = get_extension(src, /datum/extension/abilities)
+	if(!abilities)
+		return FALSE
+	. = FALSE
+	for(var/datum/ability_handler/handler in abilities.ability_handlers)
+		if(handler.copy_abilities_to(donor))
+			. = TRUE
+
+/mob/living/proc/disable_abilities(var/amount = 0)
+	if(amount < 0)
+		return
+	var/datum/extension/abilities/abilities = get_extension(src, /datum/extension/abilities)
+	for(var/datum/ability_handler/handler in abilities?.ability_handlers)
+		handler.disable_abilities(amount)
+
+/mob/living/proc/copy_abilities_to(mob/living/donor)
+	var/datum/extension/abilities/abilities = get_extension(src, /datum/extension/abilities)
+	for(var/datum/ability_handler/handler in abilities?.ability_handlers)
+		handler.copy_abilities_to(donor)

code/datums/extensions/abilities/ability_button.dm

@@ -0,0 +1,37 @@
+/obj/screen/ability_button
+	requires_ui_style = FALSE
+	requires_owner    = FALSE
+	icon = 'icons/mob/screen/abilities.dmi'
+	icon_state = "ability"
+
+	var/ability_category_tag
+	var/datum/ability_handler/owning_handler
+
+/obj/screen/ability_button/Destroy()
+	if(owning_handler)
+		owning_handler.remove_screen_element(src)
+		owning_handler = null
+	return ..()
+
+/obj/screen/ability_button/on_update_icon()
+	if(!isnull(ability_category_tag) && owning_handler?.ability_category_tag == ability_category_tag)
+		invisibility = owning_handler.showing_abilities ? 0 : INVISIBILITY_ABSTRACT
+	else
+		invisibility = 0
+
+/obj/screen/ability_button/handle_click(mob/user, params)
+	to_chat(user, "Click!")
+
+/obj/screen/ability_button/toggle_category
+	name = "toggle ability cateogry"
+	icon_state = "category"
+
+/obj/screen/ability_button/toggle_category/Initialize(mapload, mob/_owner, decl/ui_style/ui_style, ui_color, ui_alpha, ui_cat)
+	. = ..()
+	update_icon()
+
+/obj/screen/ability_button/toggle_category/handle_click(mob/user, params)
+	owning_handler?.toggle_category_visibility()
+
+/obj/screen/ability_button/toggle_category/on_update_icon()
+	icon_state = owning_handler?.showing_abilities ? initial(icon_state) : "[initial(icon_state)]-off"

code/datums/extensions/abilities/ability_decl.dm

@@ -0,0 +1,6 @@
+/decl/ability
+	abstract_type = /decl/ability
+	var/name
+	var/desc
+	var/hidden_from_codex = FALSE
+	var/is_supernatural = FALSE