arXiv AI By Zhikang Chen, Yueqing Sun, Sen Cui, Ziang Ye, Yu Wang, Yan Feng2, Xierui Song, Yu Zhang, Tingting Zhu

KPHarness: Co-Evolving Knowledge and Probing for Long-Horizon Gaming Harnesses

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KPHarness is a framework that co‑evolves knowledge and probing to adapt the external execution harness of a frozen vision‑language‑action model. By using recovery knowledge to generate intervention hypotheses and then actively probing to validate them, the system refines both the interventions applied and the probing strategy itself. The approach separates rapid policy execution from a slower research loop that updates the harness only when sandbox evaluations show improvement, enabling cross‑task reuse of validated recoveries and improved performance on Minecraft tasks such as mining, combat, and crafting.

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