If you're interested, I happened to write a simple forum software in Ruby a while ago. Indexable, light use of JS, nothing too fancy but it worked.

I never open sourced it, but if it could help keep up some communities online I would happily donate it.

We're working on an alternative. Curious to see if you think it might be a good fit for your use case: https://usepingpong.com

It’s really old, I don’t think it’s useful to anyone.

You may be underestimating its value. By the sounds of it, it seems like it would combine the best of both the chat worlds (Discord, Slack, etc) as well as a forum.

You get the friction-free experience of a chat when it comes to UX, but with the advantages of a forum such as threads, searchability (being indexed by search engines), etc.

This would be a really nice alternative to the current status quo where it's either Discourse (nice as a forum, but not ideal as a real-time chat) or Discord/Slack/IRC (nice as a chat, but siloed and not searchable).

Are you saying there are no real time “chat”-like things with indexable posts and support for non-JS clients?