Thanks for the update.  I'm impressed!  Thanks for the detailed explanation of how it works, too.

It looks like a lot of manual work is still required to make the HTML acceptable to the tools, e.g. your changes here:

  https://github.com/srfi-explorations/srfi-1/commits/master

Based on your explorations so far, how much time do you think will typically be required to prepare one SRFI?