We ran AI agent swarms in Minecraft and Mindustry

The authors partnered with Olam Labs to run multi-agent experiments in Minecraft and Mindustry, building and open-sourcing a long-running Minecraft agent harness on Mineflayer with a Pi-driven agentic loop. In a 3-hour run, 50 GPT-6.1 Sol agents pursuing "Build a thriving civilization" formed a hierarchy led by Ada, wrote shared plans and rules, sent about 5,900 messages, and shifted from exploration to food rationing after 22 of the run's 34 deaths occurred on the first night.