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Heng Wang

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#artificial intelligence Preprint Oct 2026

EnGRICH: Enhancing Generative Reward Modeling with Critiques from Humans

Generative reward models (GRMs) are important for LLM optimization. Unlike scalar reward models, GRMs generate natural-language critiques alongside preference judgments, providing finer-grained evaluation signals. Their effectiveness depends heavily on critique reliability. However, existing GRM training typically uses...

Xuan-Cheng Li, Bei-Ning Wang, Hai-Tao Li et al. · 0 citations
Preprint Aug 2026

SkillAlchemy: Open-World Agent Skill Creation

This paper proposes SkillAlchemy, an admission-centered framework for source-grounded skill creation that identifies implicit requirements through contrastive evidence, admits candidate procedures based on evidence-supported scope, and compiles the admitted content into a grammar-guided skill package.

Heng Wang, Shuyue Wei, Boyi Liu et al. · 0 citations
Preprint Aug 2026

SkillShapley: Boundary-Adaptive Shapley Valuation for Skill Step Attribution in LLM Agents

The proposed SkillShapley operates in two phases, motivated by key empirical insights, i.e., discretized benchmark rewards that create sharp performance cliffs, and step interactions that are largely additive rather than synergistic.

Chang Liu, Yu-Quan Zhang, Yiman Zhong et al. · 0 citations

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