
Harness²
Harness the agent. Then harness its self-improvement.
Product HuntOpen SourceLaunched Oct 20, 2026196#4 of the day
About Harness²
Harness² from Google Research is a plug-and-play recursive agent harnessing framework that lets LLM agents automatically evolve their execution harnesses (prompts, tools, memory) for open-world tasks—without ground-truth verifiers. Dual recursion: task-level Propose-Probe-Compose refinement + harnessing-level accumulation of reusable experience. Up to +11.5 points on professional benchmarks like WorkBuddy-Bench.
The person behind Harness²
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