what it is
A note-taking app that keeps notes as plain markdown files in a folder on your own machine. Notes link to each other, and a large community plugin ecosystem adds things like queries over frontmatter and charts.
how I use it
I run everything from a single Obsidian vault wired to Claude Code. The vault is the database, custom slash commands are the app layer, and every loop ends in a file instead of a chat transcript. This site is published from a separate Obsidian vault.