Persistent state

Goal: remember whether the HUD was hidden when the module was disabled normally.

if Storage.Layout == nil then
    Storage.Layout = {
        version = 1,
        visible = true
    }
end

local Visible = Storage.Layout.visible
local ToggleAction = InputActions:FindAction("TogglePanel")

if ToggleAction ~= nil then
    ToggleAction:OnPerformed(function()
        Visible = not Visible
        Storage.Layout.visible = Visible
    end)
end

Scheduler:OnFrame(function()
    if Visible then
        ImGui:DrawDebugText("Persistent panel")
    end
end)

false is not missing. Initialize the table only when Storage.Layout == nil.

Structure version

Perform a small migration when the format changes:

if Storage.Layout == nil or Storage.Layout.version ~= 2 then
    local oldVisible = true

    if Storage.Layout ~= nil
        and Storage.Layout.visible ~= nil then
        oldVisible = Storage.Layout.visible
    end

    Storage.Layout = {
        version = 2,
        visible = oldVisible,
        compact = false
    }
end

Limitations

• strings, numbers, booleans, and nested tables persist;
• split userdata such as Vector3 into numbers;
• assigning nil removes a key after save;
• hot reload does not serialize current state;
• test by disabling and enabling the module normally.

Reference: Storage, InputAction, and Vector3 for serializing structured values.