From the source
Andrej Karpathy — co-founder of OpenAI, former Tesla AI director, and one of the clearest explainers of machine learning concepts working today — has talked publicly about a deceptively simple idea: your personal notes and documents, organized in plain markdown, can become a knowledge base that an LLM can actually reason over.
He calls it an LLM wiki. The concept is straightforward. Instead of scattering knowledge across Notion, Google Docs, browser bookmarks, and sticky notes, you keep everything as structured markdown files. Then you point Claude Code (or any capable coding agent) at that folder and ask it questions.