Karpathy second-brain method for Claude

di Vojtech: Andrej Karpathy

Most people just ask Claude a question and close the tab, leaving all that knowledge buried in a folder nobody opens again. Karpathy's second-brain method flips that: feed Claude a source like an article, paper, or transcript, tell it to file it, and it breaks the idea down and connects it to what's already in your vault. Every new addition sharpens the whole system, so old notes get richer over time. Then you just ask questions and pull from everything at once, no more searching. The setup is just three folders and a single config file, done in the time it takes to make coffee. The blank chat is gone, you're always building on everything you know. Full A-Z guide below.