# Karpathy's rule: a second brain dies of upkeep, not bad notes. Saving is easy...
Canonical: https://social-archive.org/yena/FDWaoeX1rJ
Original URL: https://x.com/0xMoysei/status/2071264053608009766
Author: Moysei
Platform: x
## Content
Karpathy's rule: a second brain dies of upkeep, not bad notes. Saving is easy. Keeping 50 notes linked and current is the part nobody repeats. The graph rots while it still looks impressive. So he gave that job to Claude. You pick sources and ask questions. It links, files, and updates every neighbor. raw is yours, never edited. wiki belongs to the model. Not RAG. Your sources compile once and compound. 9 rules. Start with 10, not 10,000. A pile sits. A second brain compounds.