GitHub Repo
EnvHarness Reshapes Agent Training Environments Without Modifying Verifiers, Raising Out-of-Domain ALFWorld Performance by 9 Points
Teams including Google Cloud AI Research apply the agent harness concept to the environment layer, using composable interfaces to alter initial states, visible information, and task flows. Open-source experiments span five benchmarks and deliver gains of up to 9 percentage points, although reproducing the full results still requires multiple external environments and commercial model APIs.