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Full Guide: Build An AI Second Brain With Codex

2026-05-06 Science & Technology
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Matt Wolfe
Matt Wolfe
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Description

Here's how to build an AI second brain. Launch your own AI agents with OpenClaw at http://hostinger.com/mattopenclaw and get 10% off with code MATTWOLFE Discover More: 🛠️ Explore AI Tools & News: https://futuretools.io/ 📰 Weekly Newsletter: https://futuretools.io/newsletter Socials: ❌ Twiter/X: https://x.com/mreflow 🖼️ Instagram: https://instagram.com/mr.eflow 🧵 Threads: https://www.threads.net/@mr.eflow 🟦 LinkedIn: https://www.linkedin.com/in/matt-wolfe-30841712/ 👍 Facebook: https://www.facebook.com/mattrwolfe Resources From Today's Video: Karpathy Tweet: https://x.com/karpathy/status/2039805659525644595 Karpathy GitHub Page: https://gist.github.com/karpathy/442a6bf555914893e9891c11519de94f Obsidian: https://obsidian.md/ Obsidian Web Clipper: https://obsidian.md/clipper Codex App: https://chatgpt.com/codex/ Let’s work together! - Brand, sponsorship & business inquiries: [email protected] #AINews #AITools #ArtificialIntelligence Time Stamps: 0:00 Intro 1:07 The System Overview 6:14 OpenClaw on Hostinger 8:03 Karpathy LLM Wiki Concept 8:27 Tools Needed 9:41 The Buildout 18:19 Querying the Wiki 19:28 Manually Updating the Agent 21:25 Letting AI Update the Agent & Building Journal / CRM 24:46 Testing the CRM 26:01 Testing the Journal 29:11 Automating The Wiki Linking 30:30 Backing it all up to GitHub 31:41 Recap and Final Thoughts

Top Comments (10)

@RasmusRasmussen 2026-05-07

I enjoyed seeing a non-news video from you.

31
@DanBachelderSF 2026-05-06

You can also use the terminal plugin and use codex, openclaw, Claude or pi right inside obsidian. Pin the tab as a split view next to your notes and you've got a dedicated agent right in obsidian!

28 1 replies
@viktorpeterson8622 2026-05-06

Best video I've seen for a long time! Love it Matt 🤘

16 1 replies
@Calmandclarityinmidlife 2026-05-06

One vote for the “non-clicky” titles 😊

11
@aouyiu 2026-05-06

Incredulous refresh pull. I was just about to start looking for Codex guides. Matt always come through when you need them, all of the AI Matts 🤣

11
@emris4189 2026-05-07

Really awesome tutorial Matt. Please do more. Everyone is talking about what AI can do and that it is so simple to use, but not so much on how you actually do it. Simple is hard when you don't know how, so we definitely need more of "how".

5
@scroll-theory 2026-05-07

I added one thing "ask me questions while you build it ". I dont want to be left out lol

5
@lukaz2040 2026-05-08

been using a really complex version of this, that i have been building for 3 months. I went from trying to get a job as a 3D artist to getting a job as an Creative Producer leading a brand new team. This second brain brought me to a whole new level and help me sold myself in such an incredible way! This is soooooo insanely useful people!!!

3
@fe3dme03 2026-05-10

This is awesome! I would love to be able to build a tool like this that I can interact with from any device including mobile.

1
@Acts2020Project 2026-05-11

Remarkable what AI enables now that was unavailable all the years I was in business. This video brought back memories of when my cynical boss asked one of his subordinates what somebody new was doing. He was told the person was organizing our filing system. The boss said “Screw that. I don’t care about improving our filing system. I need a retrieval system.” He could have only dreamed about what you describe in this comprehensive video.

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