Interesting and strong app, I'm wondering what's the best use for this ? deployment like gulp/grunt ? ordinary devops tasks like app management and backups ?
It can take on several roles. I think the most prominent are devops / debugging live apps. It gives you a bit more leeway than having to just rely on what you logged before you deployed the app. If you are missing data, it can let you jump into a remote REPL and find out more.
Another one is helping while you are developing an app - you can call functions you are working on and play around with application state. That's why I originally put it together for myself.
But I'm sure others can think of even more inventive uses - that's why I made it extensible so others smarter than me can write plugins.