This looks really interesting. I will play around with it, but I'm curious if there's any sense of how much this would add to an existing command-line tool? For

This looks really interesting. I will play around with it, but I'm curious if there's any sense of how much this would add to an existing command-line tool? For example if all I want to do is get an upspin file, make changes, and put a (possibly new) upspin file back, would it entail significant configuration and/or a much larger executable?