AIBullisharXiv – CS AI · 6h ago6/10
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Harness-1: Reinforcement Learning for Search Agents with State-Externalizing Harnesses
Researchers introduce Harness-1, a 20B parameter search agent that separates semantic decision-making from state management by externalizing working memory to a stateful harness environment. The system achieves 73% average curated recall across eight retrieval benchmarks, outperforming comparable open-source searchers by 11.4 points while generalizing well to held-out transfer tasks.