How to make a Roblox pet system (with AI)

Files Picoo ships for this prompt

6 files · 1165 lines · one recipe call

Sample output: ServerScriptService/PetServer.lua

--!strict
-- Generated by Picoo recipe: pet_follower

-- (excerpt: equip and grant)

-- The client may only ask to equip something it ALREADY OWNS. Without this
-- check the remote hands out every pet in the game to anyone who calls it.
equipRemote.OnServerEvent:Connect(function(player, id)
	if typeof(id) ~= "string" then return end
	if id == "" then
		equipped[player.UserId] = nil
		despawn(player.UserId)
		return
	end
	if not Pets.get(id) then return end
	if not (owned[player.UserId] or {})[id] then return end
	equipped[player.UserId] = id
	spawnPet(player, id)
	-- Only here, not inside spawnPet: spawnPet also runs on load and on every
	-- respawn, and a chime each time the player dies is noise, not feel.
	local spawned = models[player.UserId]
	if spawned then
		Feedback.pickup(spawned, { player = player, keep = true, color = spawned.Color })
	end
end)

--------------------------------------------------------------------
local PetServer = {}

--- Grant a pet. Server-side only — this is how pets enter the game.
--- Returns false when nothing was granted. Callers MUST check it before they
--- take coins or finish a Robux purchase for the pet.
function PetServer.grant(player: Player, id: string): boolean
	local def = Pets.get(id)
	if not def then return false end
	local set = owned[player.UserId]
	if not set then return false end
	-- After a failed load nothing this session is saved, so on a live server a
	-- pet granted now would vanish when the player leaves. Refuse it, with no
	-- reveal: an egg, shop or receipt that checks the result keeps the purchase
	-- unpaid. A Studio play test plays on (nothing is saved there).
	if not loaded[player.UserId] and not playTest[player.UserId] then return false end
	set[id] = true
	-- A new pet is the rarest thing that happens to this player. The equip
	-- below is a confirmation; THIS is the moment.
	Feedback.reveal(nil, "epic", {
		player = player,
		label = def.name,
		position = originOf(player),
		color = def.color,
	})
	return true
end