genuinely don't get why more people aren't doing this yet Andrej karpathy (openai co-founder) posted something a few weeks back that quietly went viral: stop using claude to write code. use it to build yourself a second brain. point claude code at a folder. drop in anything an article, a transcript, a pdf. it reads it, links it, files it into a wiki of everything you've ever learned. the more you feed it, the smarter it gets. here's the entire setup: ``` /vault /raw → dump sources here /wiki → claude builds its own pages here CLAUDE.md → the instructions that run the whole thing ``` 1. install obsidian 2. create a vault 3. open it in claude code 4. paste karpathy's idea and tell claude to build it 5. claude makes the folders above automatically 6. drop a source into raw and say "ingest this" 7. ask questions across everything you've saved, forever five minutes to set up. you never start from a blank chat again. full guide below.(CyrilXBT)