Yes. If you’ve implemented a way to stop your machine when it is idle, then you won’t need auto_stop_machine.
This is true for now until we implement using the specified kill_timeout, kill_signal option when we autostop your machines.
It most likely won’t make sense to have both. auto_stop_machines is a convenient way to have your machines stopped for you that covers the most basic need – stop excess machines when your app isn’t receiving enough traffic volume to warrant running all of them. If you have any custom needs, then you’re better off implementing your own way of exiting a machine.