I Built a Second Brain Never Forget And Thinks While I Sleep
Build an AI second brain in Obsidian that never forgets and thinks while you sleep. It reads your old work, finds what made money, and writes your next move.
You know the feeling of explaining yourself over and over to different AI’s.
You feel bored, and sometimes, just spend a voice memo, or curse when AI doesn’t remember yesterday.
Well, I’ve been there and done that.
Claude.MD files are a really solid solution for most cases, but what if there is a better way?
I already built a simple AI second brain, which is the level 2 after Claude.MD files setup, and can remember a lot of things.
But I don’t want it JUST not to forget.
I want it to be able to THINK.
And the system I built does this.
How does the AI second brain work?
The system I’ve built connected all my notes using Karpathy’s wiki method.
Simply put, it reads everything I’ve ever made and compiles it into a living wiki, one page per topic.
Every time an agent runs, it doesn’t just hand me an idea; it writes back into the wiki first, so the brain gets a little smarter every single time.
New topic? It opens a new page on its own.
The wiki never stops growing.
And next, the same Hermes agents go through these connections + my previous data (my 238 articles, my 1,391 Claude.ai conversations, my 138 Claude Code sessions) and generate a thought for me, one that can change everything.
My connections are:
📓 Post: Reads my old articles + builds, finds what actually made money (with live proof from the web)
🔨 Build: Looks at what I've built but never shipped, then tells me exactly what to make next.
🏛️ Stoic: reads my journal + my own psychology, and coaches me through the day.
📣 Note: Studies my best Substack notes and hands me the next one to write.
These four agents each look at me from a different angle.
Every six hours, they update the wiki and then write me something new, while I sleep, in the journal.
Let me show you a couple of examples from here.
The AI second brain that never forgets
Here is one example “Build” suggestion.
Look at what it did.
It used my previous data(Claude code conversations), created a new SEO page, and also referred to one of my previous projects: cloning a website that generated $50K.
(This article will be published on Friday.)
How does it generate this?
First, to see how it generates, I clicked on “SEO Agent - Ideas,” the link right under the build.
These ideas were scraped from my previous Claude Code conversations: builds I created but never published as articles.
It also cross-checks them with my article data.
Based on these conversations and my previous Substack post ideas, I generated a new page called SEO.
Then it analyzed my Substack post statistics and reminded me that one of my previous articles converted 3 readers into paid subscribers.
So this one has conversion potential too.
The Second Brain That Thinks
I am working a lot. Probably like you.
Sometimes I break; that’s exactly why I lean on Stoic philosophy.
It keeps me consistent and calm, so I read a little Stoicism every day.
And now, I take daily notes about my last few days: how Substack went, what I should do, what I got wrong.
To make it actually work, I analyzed all of my Claude.ai conversations, using Claude itself, to build a profile of me.
How I act when I’m angry. When I get pissed. All of it.
It saved everything to a page called Gencay-Psychology, and every day it reads from there, plus my daily journal, then writes notes to me like this:
That’s the soft part.
Now the pragmatist part. It reads all of my past Substack note stats, how much each one shared, got liked, got restacked, plus every note I’ve ever written, and it generates new wiki pages using Karpathy’s method.
Then it analyzes the results, does its own web research to make sure my notes actually solve a problem, and suggests the next one to write, like this:
This is beyond crazy. One word: amazing.
Because, believe it or not, I started writing the Substack notes it told me to.
The Substack posts actually make sense, and I started backlogging them, and the daily Stoic notes?
They catch the exact mindset I keep losing.
How do you set up?
Now I’m going to explain how to set up.
You can do it in 3 steps.
Two of them take two minutes.
The third one, the skill does for you while you watch.
Here are the files 👇
