How to Build a 'Second Brain' for Claude Code Using Obsidian

Obsidian, a free app based on markdown files, can act as persistent memory for your code agent and online assistants. Here's how to set it up. From students to code agents. Originally launched to meet the needs of students, researchers, and writers, Obsidian has gradually established itself as a true memory management tool for AI agents. Sometimes called the second brain of AI agents, the tool centralizes their memory notes. With real knowledge structuring, Obsidian goes beyond simple agent memory, making it truly useful and personalized as you interact with your AI. At first glance, Obsidian is just a markdown file manager. But the tool goes much further. It not only lets you create memory notes (in MD format), but—its real advantage—it lets you link them together.

First reported by Journal du Net. This page is a short excerpt; the full text is theirs.