Stop word for rhasspy

Hello, everybody
I’d like to have something like kill switch for rhasspy which should override all the activity of rhasspy and stop it
I’ve found that I can run second process of wakeword which would listen for stop word
Is this a common way to solve the task or there is a better solution?
Is there and hermes api call which sould be called after I got the stop word?

And another close question
I use mycroft-precise as a wakeword and I’d like to collect wake-words and not-wake-words on the fly
I’d like to create skill “goodboy/badboy” which will save latest wakeword to corresponding folder
If someone have already created something for this purpose?