actionable ai

Free guide

How To Build An AI Second Brain

Step-by-step guide + the one Claude skill that does it for you. Install Obsidian, install the skill from GitHub, feed it your notes, and watch your second brain grow. Never forgets, understands connections, gets smarter the more you use it.

  • Step-by-step guide: install Obsidian, install the skill, run it, feed it your data
  • What to feed your brain first for the strongest foundation
  • 5 things you can build: client databases, session memory, AI chief of staff, competitor intel, content research
  • How the brain gets smarter every session (hot cache system explained)

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Step-by-step guide to building an AI second brain with Claude and Obsidian. One skill builds the whole thing for you. Never forgets, gets smarter every session.

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A look inside

What's inside

01

What You'll Learn

What an AI second brain actually is and why it beats a plain notes app How to install Obsidian and the free Claude skill that builds the brain for you The exact commands to feed it data, research topics, and query it with citations What to feed it first and the powerful systems y

02

What You're Building

You're building an AI second brain that never forgets, understands the connections between all your notes, research, and projects, and gets smarter the more you use it.

03

What You Need

Claude Code installed About 10 minutes for setup Your notes, files, and research (anything you want the brain to know) No coding or technical experience required

The rest of the guide

  1. Step 1: Install ObsidianDownload and install Obsidian.
  2. Step 2: Install The Skill From GitHubThis is the skill that tells Claude exactly how to read your notes and data, pull out the key concepts, and link them all together into a self-organizing second brain.
  3. Step 3: Run The Skill And Feed It Your DataOpen Claude Code in the same folder.
  4. What To Feed It FirstThe more you feed it, the smarter it gets.
  5. What You Can Build With Your Second BrainOnce your brain has content, you can use it to build some seriously powerful things: Client databases that remember every detail and conversation you've ever had with them Full memory of your Claude sessions and tasks so you save tokens and never lose context on projects An AI ch
  6. Why It Gets Smarter Every SessionNormal Claude starts fresh every session.
  7. Go DeeperPrintable PDF version of this guide: Want the whole system installed live, with Cooper on the call?

About the author

Cooper Simson

Founder of Actionable AI. 30,000+ operators read the newsletter.

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Questions, answered

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No. The guide explains the work in practical steps and calls out technical details only when they matter.

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