Karpathy's LLM wiki concept is good, but it is not perfect. There is one thing missing from it Everyone built the filing cabinet. Documents go in, the model reads across all of them, answers get better. That part is real. The missing thing is action. Nothing in that folder ever moves until you sit down and ask it to. The harness is the other half. It is the rules that let something act on that cabinet while you are asleep: what it may open, what counts as finished, what it writes back, and who checks it. What the pair looks like: the notes folder holds what you know. Four more files hold what is being done. A spec, a plan, a progress log, and a list of decisions already made. The assistant reads all of it before it starts and updates it when it stops. What that gets you: close the laptop mid-task, open it tomorrow, and it carries on from where it stopped instead of asking you to explain again. The one rule: if it is not in a file, it does not exist. Full breakdown in the article below