title: @NickSpisak_: we literally just rebuilt @karpathy's viral second brain in under 20 minutes.
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author: @NickSpisak_
contenttype: tweet
publication: Twitter/X
published: 2026-04-07T16:31:00+00:00
sourceurl: https://x.com/NickSpisak_/status/2041554343137272071
word_count: 159
we literally just rebuilt @karpathy's viral second brain in under 20 minutes.
No code. One free Claude Code skill. Even if you've never opened a terminal.
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