Yo, your youtube got some great content! Cool project too! A long time ago I used to use Vim (when I had the time to code) was really proud of my NERDTree setup with Tmux, YouCompleteMe, and Tabular on Vim but I think your setup is next level esp with Nostr integrated now 😁!
For markdown I write on Obsidian these days and actually another maker created a plugin for it to post to Nostr too. You can check it out here: https://bolt.fun/story/introducing-nostr-writer-obsidian-plugin--999