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reinforcement learning 2chain-of-thought 1credit assignment 1evidence retrieval 1large language models 1provenance 1reasoning 1reward shaping 1search agents 1

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cs.AI2026

STAMP: Provenance-Guided Credit Assignment for Deep Search Agents

Ke Xu, Han Xu, Xinran Chen +6

The paper presents STAMP, a method that assigns credit to individual actions of deep search agents by verifying whether retrieved documents support evidence in a training-time grap…