One of the most specific pieces of feedback on our TraceArena launch was: pause a simulation at any decision point and create a new branch like Git for agent trajectories.
TraceArena is an open-source AI World OS for simulating real-world problems. Define goals, resources, rules and tools, load a scenario pack, configure your LLM, and let multiple agents compete inside one world. Every observation, decision, action, consequence and settlement is visible and replayable. Build worlds for capital markets, city governance, drug discovery, logistics or robotics.
