Author

Ke Xu

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Jul 2026

STAMP: Provenance-Guided Credit Assignment for Deep Search Agents

STAMP is proposed, in which a reference-based verifier judges whether each cited document supports an entity or relation in a training-time evidence graph, and first-exposure attribution traces each supported citation back to the action that first surfaced it.

Ke Xu, Han Xu, Xin-Ran Chen et al. · arXiv.org · 1 citation

Jul 2026

SCOPE-RL: Optimizing Reasoning Paths Before and After Success

SCOPE-RL improves average accuracy by up to 11.2 pp and reduces reasoning tokens by up to 27.1% over outcome-only GRPO, indicating that reward-signal densification is complementary to policy-update-level RLVR advances.

Xiaojia Liu, Han Xu, Jianqiang Xia et al. · arXiv.org · 0 citations