The invite by email feature sounds great, but as you say setting up a github account for a client isn't that much friction. It's not something I'm bothered by at all, but being able to use just an email is definitely supremely more preferable.
Very exciting work.
As I'm quite enthused by the project, I hope you don't mind if I offer some hopefully helpful feedback:
- For the video on your landing page, ideally the youtube would be embedded so it doesn't open another window
- In regards to the video, while I love the content and info, it's not the most marketing friendly. It's over 2 minutes before the background of the video even changes. Ideally the video would get into the demo portion muuuch quicker.
- I clicked on this hackernews link, clicked through to your landing page, scrolled around, but really didn't get a grasp of what it was offering or how it worked or who or what it was for (admittedly I was prly lazy reading). Only after I watched the video, heard you specifically mention eleventy (which I personally use a lot) was my interest piqued enough to actually engage in the content and understand it more. Glad I did, but I gotta feel there's some better way of presenting what you're doing. I quite liked your calling it a wordpress-like CMS over top an existing static site stack.
Those are just the thoughts that came to me. I absolutely love the project, thrilled it's MIT too. Though I'm not really a javascript dev I could definitely see myself using and contributing!