Better command handler for root command + subcommand

[juni-b-queer]

I want to be able to easily make a bot like !jazbot that has the root command !jazbot and then multiple subcommands.
An example would be
!reminderbot then have commands like

• remindme {time string} (set reminder)
• list (list reminders for your account)
• cancel (a reply to a reminder that will be canceled)
• repeat {additive time} (repeats a reminder)

I'd like to be able to do something like this (pseudo code)

CommandHandler.make("rootCommand")
   .setCommand("subCommand", [additional Validators], [actions for command])
   .setCommand("subcommand2" [validators], [actions])