Penguh's Head⇄Swap

• To put an item on your head, type /trigger headswap while holding the item of your choice.
• If there's already an item on your head, it will swap with what you're holding.
• If the item on your head has Curse of Binding, it will not be swapped.

Uninstall with /function headswap:uninstall, or /scoreboard objectives remove headswap.