Give the server ownership of shared state

local Players = game:GetService("Players")
Players.PlayerAdded:Connect(function(player)
    player:SetAttribute("Coins", 0)
end)

The server writes shared progression state. Client presentation can observe it without deciding authoritative amounts.

New syntax: client-server, replication, authority

• script-locations
• execution-context

Main guided reference implementation; use the hierarchy’s stated Script or ModuleScript type.

local Players = game:GetService("Players")
local function initialize(player)
    player:SetAttribute("Coins", 10)
end
Players.PlayerAdded:Connect(initialize)
for _, player in ipairs(Players:GetPlayers()) do initialize(player) end

Server creates the practice state.

local Players = game:GetService("Players")
local function initialize(player) player:SetAttribute("Coins", 10) end
Players.PlayerAdded:Connect(initialize)
for _, player in ipairs(Players:GetPlayers()) do initialize(player) end

Client prints updates and the current value; initial replication can still be pending.

local player = game:GetService("Players").LocalPlayer
local function display() print("Displayed coins", player:GetAttribute("Coins")) end
player:GetAttributeChangedSignal("Coins"):Connect(display)
display()

An initial nil means the attribute has not arrived yet; the change signal displays the subsequent value.

Do not use the client console as evidence of server ownership.

This is a bounded learning lab. It has not been executed in an approved Roblox Studio environment by this website.

A checked checklist records your own review, not automated project competence or a community verification.

The server creates a practice Coins attribute on each Player. Replication lets clients display that value. The browser cannot demonstrate this engine behavior.

A LocalScript is controlled by the client. A local coin change or a button claiming a reward is not trusted evidence that the server awarded anything.

This lab deliberately separates a server-owned number from a local display. It grants no real economy or community role. Later chapters teach server-validated requests.