title: @coreyganim: keep calling it a toy...
but we just built Karpathy's "second brain" system live in under 20 minute...
author: @coreyganim
contenttype: tweet
publication: Twitter/X
published: 2026-04-08T23:52:00+00:00
sourceurl: https://x.com/coreyganim/status/2042027711930277976
word_count: 164
keep calling it a toy...
but we just built Karpathy's "second brain" system live in under 20 minutes.
one npm command. fully working.
your AI remembers everything you feed it. forever.
Video
Corey Ganim (@coreyganim)
Karpathy dropped a viral post about building a "second brain" with AI. We built it live in under 20 minutes.
The system:
1. Three folders: raw/ (brain dump), wiki/ (AI organizes it), outputs/ (query results)
2. One-click install: npx skills add NicholasSpisak/second-brain
3. Obsidian Web Clipper to capture any article with one click
4. Run "ingest" and the AI reads everything in raw/, builds wiki pages, and maps connections automatically
5. Query your own knowledge base like talking to an expert
6. Monthly lint command catches contradictions and gaps before they compound
Day 1 it's basic. Day 90 it's a company asset nobody else has.
Free skill in the YouTube description that scaffolds the whole thing in 60 seconds.
Video below, YouTube link in the replies.
Video
— https://nitter.net/coreyganim/status/2041540491859169435#m