I'm using a custom suggestion provider for the arguments so I'm using #register(LiteralCommandNode) but I've discovered that it leaves minecraft:command tab completion in (I also register plugin:command so I get a minecraft:plugin:command option as well). If I use #register(Command, LiteralCommandNode) then it replaces my suggestion provider with Bukkit's. An option would be useful in this case where I can let Commodore deal with Bukkit's things but let me use the vanilla method.