Petra (Obsidian CLI) and Petra-Bridge (Obsidian API for the CLI tool integration). https://github.com/H4ZM47/petra-obsidian-cli ; https://github.com/H4ZM47/petra-bridge

This was a "scratching my own itch" project that I cooked up because I was tired of Claude et al cluttering up all of my stuff with random markdown files. Just a simple Obsidian plugin to serve an API that the CLI tool can use to interact with the Obsidian vault. I use a Claude Skill to get the model to create all of those random markdown files in my Obsidian vault, and read from them when it needs context for something. It's working really well for me so far!