One point to add about integration between LLMs and Obsidian: plugins.

Obsidian has a plugin system that can be easily customized. You can run your own JS scripts from a local folder. Claude Code is excellent at creating and modifying them on the fly.

For example, I built a custom program that syncs Obsidian files with a publish flag to my Github repo, which triggers a netlify build. My website updates when I update my vault and run a sync.