This is awesome! Very clever to use Gists. (As SDEES author, I'm also super happy to be able to serve as inspiration.)
Could you add functionality to list available documents? Perhaps its possible to get a list of the documents using Gist API after getting GH credentials so the user doesn't have to copy-paste the Gist ID.
Could you add functionality to list available documents? Perhaps its possible to get a list of the documents using Gist API after getting GH credentials so the user doesn't have to copy-paste the Gist ID.