This is what I am talking about These predictions could be extremely useful in many situations. For example, in PermissionsEx the commands can be difficult to learn. For example, if I wanted to give myself a singe permission I would use /pex user <name> add <permission> If the autocomplete would make using this extremely simple.Is there currently a way or will it ever be possible for developers to use this feature? Once again, it would make all plugins more user friendly. EDIT: What about the incorrect arguments? Once again, extremely useful. Yes, I am aware that there are ways to recreate this. Using a premade method to doing this would be convenient, and this also allows the user to click on the message to continue writing the command.