should be ready.

code/game/objects/items/implants/implant_mindshield.dm

@@ -20,7 +20,7 @@
 /obj/item/implant/mindshield/implant(mob/living/target, mob/user, silent = FALSE)
 	if(..())
 		if(!target.mind)
-			target.add_trait(TRAIT_MINDSHIELD, "implant")
+			ADD_TRAIT(target, TRAIT_MINDSHIELD, "implant")
 			target.sec_hud_set_implants()
 			return TRUE
 
@@ -49,7 +49,7 @@
 				to_chat(target, "<span class='warning'>You feel something interfering with your mental conditioning, but you resist it!</span>")
 			else
 				to_chat(target, "<span class='notice'>You feel a sense of peace and security. You are now protected from brainwashing.</span>")
-		target.add_trait(TRAIT_MINDSHIELD, "implant")
+		ADD_TRAIT(target, TRAIT_MINDSHIELD, "implant")
 		target.sec_hud_set_implants()
 		return TRUE
 	return FALSE
@@ -58,7 +58,7 @@
 	if(..())
 		if(isliving(target))
 			var/mob/living/L = target
-			L.remove_trait(TRAIT_MINDSHIELD, "implant")
+			REMOVE_TRAIT(L, TRAIT_MINDSHIELD, "implant")
 			L.sec_hud_set_implants()
 		if(target.stat != DEAD && !silent)
 			to_chat(target, "<span class='boldnotice'>Your mind suddenly feels terribly vulnerable. You are no longer safe from brainwashing.</span>")

code/game/objects/items/implants/implantchair.dm

@@ -185,7 +185,7 @@
 		objective = stripped_input(usr,"What order do you want to imprint on [C]?","Enter the order","",120)
 		message_admins("[ADMIN_LOOKUPFLW(user)] set brainwash machine objective to '[objective]'.")
 		log_game("[key_name(user)] set brainwash machine objective to '[objective]'.")
-	if(C.has_trait(TRAIT_MINDSHIELD))
+	if(HAS_TRAIT(C, TRAIT_MINDSHIELD))
 		return FALSE
 	brainwash(C, objective)
 	message_admins("[ADMIN_LOOKUPFLW(user)] brainwashed [key_name_admin(C)] with objective '[objective]'.")