inventory script containers can now have gui: true added to them, which will indicate that the inventory script is a GUI - that is, a set of buttons instead of a container of items. When this is enabled, players will be prevented from adding items into or taking items from the inventory (at least through normal clicking action). This removes the utter mess that new users learning to make GUIs have to go through with event priorities and old videos and all that... now you can just set gui: true, listen to the after player clicks myitem in myinventory: event as normal, and be done with it. This actually does a better job than the old recommend path, as it only blocks clicks that would alter the top inventory, rather than also blocking players clicking in their own inventory.