It seems that Artanis and Haunt have no such functionality
So ng0 is thinking to extend those and implement that functionality themselves
Because they want something Guile based
So they're asking how to proceed in order to make the result of such effort available not only to their site, but to the general Artanis/Haunt community.
This is the context, to the extent that I'm aware of it
My suggestion would be to extend Artanis/Haunt and send patches upstream.
The Guile web site will catch up eventually.
Otherwise, ng0, you could manage to produce some patches that apply to the common subset of files (common between Artanis/Haunt and your site)