Segundo Cerebro. Pro
The system where you save and connect everything you learn about your topic. Hand it to your AI, it guides you through the setup, and you finish with your first notes inside. Built on the protocol Andrej Karpathy made viral.
Best with Claude: it builds and maintains everything automatically. It also works with ChatGPT, Gemini or any AI with access to your files — you'll just handle the upkeep by hand there.
Want the full story first? I wrote it all up, free (in Spanish):
From the newsletter Your 'second brain' in one afternoon. The most impressive thing I've tried in AI this year. Read the article ↗What you learn today is forgotten in two weeks.
A second brain fixes that: one place where everything you learn gets saved, connected, and comes back to you. And if you work with AI, it gives your AI memory of your topic so it stops improvising. The idea is never the problem — building it is: most people get stuck three steps in.
What you build: a map of notes that connect on their own as you learn.
Three steps. You answer, your AI organizes.
Download and open EMPIEZA-AQUI.html with a double click.
Copy the installer, paste it into your AI, and it walks you through it.
Tell it your topic and answer its questions. In 20 minutes it's built, with your notes inside.
What you get
- The vault and the installer your AI runs with you, step by step.
- An "I'm stuck" button you paste whenever you hit a wall.
- A 5-minute weekly ritual so it's still alive a year from now.
- If you use Claude, the skills that keep it running on their own.
Who it's for
- You save articles, threads and notes — and then can't find anything.
- You use AI daily and you're tired of repeating your context in every new chat.
- You learn, study or write seriously and want a memory that doesn't leak.
- Notion and Obsidian appeal to you; you like keeping things organized.
- You want your AI working on your material, not on whatever it makes up.
Who it's not for
- You already have a second brain up and running.
- You're after the theory of the second brain. I share that for free in the newsletter.
- It's your first day with AI and you don't use it daily yet.
- You expect the AI to do it all on its own without you adding anything. The material comes from you.
- You want just another app you install and forget. This is a system you keep alive.
Hand it to your AI. It guides you. You'll have it today.
Buy Segundo Cerebro · €47One-time purchase · download it and it's yours — no account, no subscription