Add code

api.lua

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+kitpvp = {
+  api = {},
+  kits = {}
+}
+
+function kitpvp.api.give_to_player(player, item)
+  -- Values nil? If so, close this function
+  if not player or not item then return end
+
+  -- Add it
+  minetest.add_item(player:get_pos(), item)
+end
+
+function kitpvp.api.kit_exists(kitname)
+  return kitpvp.kits[kitname] ~= nil
+end
+
+function kitpvp.api.get_kit_definition(kitname)
+  -- Just to be sure
+  if not kitpvp.api.kit_exists(kitname) then return end
+
+  return kitpvp.kits[kitname]
+end
+
+function kitpvp.api.register_kit(def)
+  local name   = def.name
+  local items  = def.items
+  local armor  = def.armor
+  --local effects = def.effects
+
+  -- Is $def completly filled in?
+  if not name or not items or not armor then return end
+
+  -- Register the kit
+  kitpvp.kits[name] = def
+end
+
+function kitpvp.api.get_kit_names()
+  local kits = ""
+
+  for kit in pairs(kitpvp.kits) do
+    kits = kits .. kit .. ","
+  end
+
+  kits = string.sub(kits, 0, string.len(kits) - 1)
+
+  return kits
+end
+
+function kitpvp.api.give_kit(player, kitname)
+  -- Check if the kit exists
+  if not kitpvp.api.kit_exists(kitname) then return end
+
+  -- Make sure that $player != NULL
+  if not player then return end
+
+  -- Get the kit's definition
+  local def = kitpvp.api.get_kit_definition(kitname)
+
+  -- Add the things
+  -- DEFAULT items
+  if def.default_items then
+    for i=1,64 do
+      kitpvp.api.give_to_player(player, "mcl_mobitems:cooked_beef")
+    end
+  end
+
+  -- ARMOR
+  local components = {"helmet", "chestplate", "leggings", "boots"}
+
+  for i, component in pairs(components) do
+    i = i + 1
+
+    local item_name = "mcl_armor:" .. component .. "_" .. def.armor
+
+    kitpvp.api.give_to_player(player, item_name)
+  end
+
+  -- ITEMS
+  for i, item in pairs(def.items) do
+    kitpvp.api.give_to_player(player, item)
+  end
+end

commands.lua

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+minetest.register_chatcommand("kit", {
+  description = "Gives you a kit to PvP",
+
+  func = function(name, param)
+    local player = minetest.get_player_by_name(name)
+
+    if not player then return end
+
+    if param == "list" then
+      return false, "Available kits: " .. kitpvp.api.get_kit_names()
+    else
+      kitpvp.api.give_kit(player, param)
+    end
+  end
+})

init.lua

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+local modname = minetest.get_current_modname()
+local modpath = minetest.get_modpath(modname)
+
+if modpath then modpath = modpath .. "/" end
+
+local launch = {
+  "api.lua",
+  "kits.lua",
+  "commands.lua"
+}
+
+for _, item in pairs(launch) do
+  dofile(modpath .. item)
+end

kits.lua

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+--[[
+HOW TO ADD KITS:
+
+kitpvp.api.register_kit({
+  name = agreatkitname,
+  items = {itemstr1, itemstr2, itemstr3},
+  armor = leather/chain/iron/gold/diamond/netherite
+})
+]]
+
+kitpvp.api.register_kit({
+  name = "tank",
+  items = {"mcl_tools:sword_iron"},
+  default_items = true,
+  armor = "iron"
+})
+
+kitpvp.api.register_kit({
+  name = "archer",
+  items = {"mcl_tools:sword_stone", "mcl_bows:bow", "mcl_bows:arrow 10000"},
+  default_items = true,
+  armor = "gold"
+})
+
+kitpvp.api.register_kit({
+  name = "speedrunner",
+  items = {"mcl_tools:sword_stone", "mcl_potions:swiftness_2"},
+  default_items = true,
+  armor = "gold"
+})