I tried to git my resume once upon a time. It's still something I'd love to finish doing, it just makes sense to have a git repository as a timeline of your life:
Custom LaTeX classes made this more trouble than I was willing to deal with, so I decided to not pursue it further. I suspect Markdown might have similar challenges dealing with this, although given that the "verbose mode" is just HTML, I might be able to make it work.[1]
The print media type has been around for eons, but the @page rules don't support everything I need and are generally absent in WebKit browsers.