We just launched this new website featuring Hubzilla Developer Documentation. Currently it is very sparce, but here is an article talking about what we are building.
https://development.guide/articles/hubzilla/a-need-for-codebase-documentationWe also have our first wiki pages related to Hubzilla URLs.
https://development.guide/wiki/hubzilla/code/home https://development.guide/wiki/hubzilla/code/admin https://development.guide/wiki/hubzilla/code/admin/siteThese link to the repositories and tell your which modules, templates, and layouts a URL is calling, among other things.
A good start, but so much more to do.
