# How I Built a Second Brain for Agents

DevFeed: [How I Built a Second Brain for Agents](<https://devfeed.tech/articles/how-i-built-a-second-brain-for-agents-28982.md>)

Original publisher: [Read original article](<https://codingwithroby.substack.com/p/how-i-built-a-second-brain-for-agents>)

Author: Eric Roby

Published: 2026-05-26T13:01:18Z

Content type: tutorial

Language: en

Sources: [Eric Roby](<https://devfeed.tech/sources/eric-roby.md>)

Topics: [Obsidian](<https://devfeed.tech/topics/obsidian-md.md>), [Claude Code](<https://devfeed.tech/topics/claude-code.md>), [Markdown](<https://devfeed.tech/topics/markdown.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [Git](<https://devfeed.tech/topics/git.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [claude-code](<https://devfeed.tech/tags/claude-code.md>), [cli](<https://devfeed.tech/tags/cli.md>), [git](<https://devfeed.tech/tags/git.md>), [markdown](<https://devfeed.tech/tags/markdown.md>), [memory](<https://devfeed.tech/tags/memory.md>), [obsidian](<https://devfeed.tech/tags/obsidian.md>)

## AI overview

The author describes using an Obsidian vault of Markdown files as a persistent context system for Claude Code and other agents. The setup includes four folders, a daily note, and essential plugins, with the goal of preserving project decisions and making notes available to future agent sessions.

## Source excerpt

The notes aren't for me anymore. They're for the next agent that asks me what I already know.