Have an idea of how I would do this already, give me until the end of the week. To be clear, an interface like this?

Infat list [--identifier] [--application] Where identifier and application are mutually exclusive, and application lists the openers it is capable of opening by default? Merging the application flag for simplicities sake, so either returns a list with both their possibilities *and* the assigned apps.

Thoughts?

Love it! Seems like it'd be easy to filter out extensions I wanna keep and switch them all to emacs or whatever.