This looks interesting. I'm going to assume that you add whatever temporary buffer you use while editing the files to your gitignore? E.g. Vim will use .swp files.

Does this get annoying if you want to commit something specific? Let's say you edit an old note and save the file. Then, in the time it takes for you to write a commit about this new edit, your cron script has added your change as a 'wip'.

Also, is there a nice way to set this up with a cron script so that you can use git via ssh (rather than https) but still keep a passphrase on the key? I seem to remember having problems with cron and git regarding ssh keys.