Google Cloud AI Research open-sources Harness², a recursive agent harnessing framework that improves LLM agents via iterative harness refinement without changing model weights.
Open source release Provisional 82% confidence first seen
Google Cloud AI Research released Harness² as an open-source, plug-and-play framework for recursive LLM agents. The coverage says it refines an agent’s surrounding harness components—such as prompts, tools, and memory—over time without altering model weights, and it reports gains on professional benchmarks including WorkBuddy-Bench.