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Yujian Zheng

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#artificial intelligence Preprint Oct 2026

CoSA: The Conflict of Skills Attack in Real-World LLM Agent Ecosystems

Agent Skills allow LLM agents to combine reusable capabilities, but checking each Skill in isolation cannot rule out policy violations when they are composed. We term such failures Conflict of Skills (CoS): artifacts or assessment signals produced for one purpose may be reused downstream without preserving the restrict...

Yu-Jian Zheng, Tian-Hao Li, Shang-Zhi Xu et al. · 0 citations
#artificial intelligence Preprint Aug 2025

StructSynth: Dependency Graphs as Generation Plans for Low-Data Tabular Synthesis with Language Models

StructSynth is introduced, a framework that treats a dependency graph as a generation plan---determining the generation order, conditioning context, and scope of each black-box LLM call, and achieves state-of-the-art downstream utility and the best privacy-risk ranking among fourteen compared generators in low-data set...

Si-Yi Liu, Yujian Zheng, Haoyang Li et al. · 0 citations
Conference Open access 2026

Mechanistic Interpretability Should Prioritize Feature Consistency in Sparse Autoencoders

This work proposes the Pairwise Dictionary Mean Correlation Coefficient (PW-MCC) as an assignment-based metric to quantify consistency and demonstrates that high levels are achievable with appropriate architectural choices for TopK SAEs on LLM activations with appropriate architectural choices.

Xiangchen Song, Aashiq Muhamed, Yujian Zheng et al. · 0 citations

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