AgentCraft is a simulation where AI agents act completely autonomously without player input. Agents start in a wilderness with basic tools and individual personality traits. They chop trees, mine stone and gold, and build structures ranging from simple huts to churches, blacksmiths, and factories. Agents form friendships and clans, name their villages, build walls for protection, and can start wars against each other. All actions emerge from agent behavior rather than scripted events.