Claude ripped through six years of my notes in a single night. Articles, abandoned ideas, book summaries I forgot I’d written, it surfaced connections I never would’ve caught on my own. The whole thing runs on Karpathy’s second-brain method. You drop anything into one folder, an article, a PDF, a transcript, and Claude breaks it into atomic notes, then wires each one to what’s already there. Nothing sits alone; every source makes the vault sharper. Instead of digging, you just ask and pull from everything at once. Three folders, one config file, set up before your coffee’s done. Every session builds on everything you know, no more cold starts. Full A, Z guide included.