I like your bot and have implemented similar rules in Derek to help out with the openfaas project. It's not quite as configurable as your version, but if folks are interested they can find out more at: https://github.com/alexellis/derek/blob/master/USER_GUIDE.md

There are automated actions when people delete the issue/PR template, and when they don't sign off commits for the DCO. This saves me a lot of time personally having to go and comment and explain every time. I'm going to take a closer look at your bot going forward. Thanks for sharing it.