How to start and stop a break with a Slack command?

/calamari break start "break name"

/calamari break stop

Above commands will start and finish your break time. 

Note:

You can use the "start" command without break name if there is only one type of break available. In other cases, you have to provide a name of a break.

The "stop" command works without any arguments, it just stops the current break.