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Seems really interesting but (alas) hasn't been updated in 5 years.

I've heard that https://hyperstack.org/ took up this mantle?

Hmm, I just checked and it looks like it hasn't seen much work lately either.

Hyperstack is still fairly active, it just has a very small dev team. They're responsive on their slack channel if you ever need help.

Looks like the author was looking for someone to take over but doesn't look like that happened: https://github.com/voltrb/volt/issues/357