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Author

Yu Xia

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Agentic Chain-of-Thought Steering for Efficient and Controllable LLM Reasoning

Agentic Chain-of-Thought Steering (ACTS), which formulates reasoning steering as a Markov decision process where a controller agent adaptively steers a frozen reasoner during inference, and enables budget-aware strategy control for efficient reasoning while preserving the reasoner's generation continuity.

Yu Xia, Zhouhang Xie, Xin Xu et al. · 0 citations
Preprint Aug 2026

NeuronGuard: Robust LLM Safety Alignment via Ablation-Aware Safety Signal Redistribution

A fine-tuning-stage defense that simultaneously hardens LLMs against both attack classes by redistributing safety signals across a broader set of neurons, and provides a formal guarantee that NeuronGuard strictly reduces the attack success rate (ASR) upper bound.

Anjun Gao, Yueyang Quan, Yu Xia et al. · 2 citations
Preprint Jul 2026

Who Broke the System? Failure Localization in LLM-Based Multi-Agent Systems

Experimental results show that AgentLocate consistently outperforms existing failure localization methods in identifying both responsible agents and failure steps, while remaining efficient in terms of token usage and running time.

Yu Xia, Anjun Gao, Yueyang Quan et al. · 0 citations

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