Claude Code + Obsidian: Build a Second Brain That Actually Thinks

Who this is for: Developers, researchers, or knowledge workers who take notes in Obsidian and want Claude Code to read, write, and act on their vault — not just answer questions about it. Why This Combination Works Claude Code has one fundamental problem: it forgets everything between sessions. Every time you start a new session, you're starting from scratch. Obsidian has one fundamental advantage: everything is a plain Markdown file on your local disk. No API. No proprietary format. Just files. Put them together and the problem disappears. Claude Code can read every note you've ever written, understand your thinking patterns, and pick up exactly where you left off — because your vault is its persistent memory. Without Obsidian: Session 1 ──X── Session 2 ──X── Session 3 (context lost) (context lost) With Obsidian vault: Session 1 ──→── Session 2 ──→── Session 3 (vault grows) (vault grows) The setup is surprisingly simple. Obsidian stores plain text. Claude Code reads plain text. No int