I Taught AI to Play RuneScape (Then It Beat Every F2P Quest)

I spent five months teaching an AI to play Old School RuneScape by itself. It started with a single AI agent that couldn't get through a door on Tutorial Island, died to a jail guard, and got stuck walking in and out of Falador's gate for ten minutes. It ended with three AI agents talking to each other, a web dashboard I built to manage them, a custom harness that runs on cheap models, and the final free-to-play quest, which requires a real human partner, completed by an AI that negotiated with a stranger in a public clan channel. 0:00 Disclaimer 0:08 Quest you can't do alone 1:06 A Single Agent 4:11 Copy and Paste Puppet 5:20 Human out of the Loop 8:34 Too Much Management 9:49 Context MinMaxing 11:38 Railyard: an Agent Management Platform 13:04 Custom Harness: 5 cents an hour 15:58 Lessons Learned An AI that refused my own kill order because it thought I was a prompt injection, memory files full of war stories the AI shouldn't have kept.