The hardest part of Karpathy's LLM wiki pattern isn't the idea. It's the setup. A local Obsidian vault. Claude Code in a terminal. A schema file. A log file. A habit you now have to maintain. Most people won't keep that running. There's a simpler version: a hosted knowledge base Claude can read, write to, and maintain through MCP, without running anything locally. What you're building A structured knowledge base that Claude stays connected to. Not a document you paste in at the start of each conversation. A live system where: Claude can fetch your notes when it needs context Claude writes new notes back Your knowledge compounds across every session If you want to understand why this pattern works, start here . This post is about how to build it. Before you start You need three things: A Hjarni account Claude Desktop or another MCP-capable Claude client Ten minutes to create your first notes You do not need Obsidian, Claude Code, a terminal setup, or a local folder full of Markdown files.…