Hey author here. Happy to answer your questions!
Big fan of yours. I think this is the second time I’ve come across your site on HN. I’ve been getting deep into developing my own Second Brain lately. I glanced briefly at your Exobrain Repo and it seems you’re using a custom system. Have you tried out using https://obsidian.md or the whole Wikilink/Zeitelkasten Personal Knowledge Management methodology? Curious to hear your experiences.
I started a draft describing my 'process' [2], but it's pretty incomplete.. there are some bits scattered across exobrain too.
Also lately I started playing with Logseq [3] to get a more interactive representation of exobrain [4] (warning, it's pretty heavy, needs some optimization and I might have messed up the physics). Logseq could be a great gateway for people who want to get into org-mode but not ready to go 100% Emacs, highly recommend to try it it!
[0] https://github.com/org-roam/org-roam
[1] https://beepb00p.xyz/pkm_processing.html
[2] https://beepb00p.xyz/pkm-search.html