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Bo-Xuan Zhang

3 papers indexed here

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#natural language process... Preprint Aug 2026

RePolicy: Reinforcement Learning for Safety-Policy Invocation in Agent Safeguards

Safeguarding language model agents requires assessing complete execution trajectories under context-dependent safety policies. Existing policy-aware safeguards mainly rely on prompting or supervised fine-tuning, limiting their ability to adapt to unseen trajectories and changing policy contexts. We propose RePolicy, an...

Hou-Cheng Jiang, Bo-Xuan Zhang, Qi-Yong Zhong et al. · 0 citations

TRACES: Proactive Safety Auditing for Multi-Turn LLM Agents via Trajectory-State Modeling

TRACES is a representation-based proactive auditor that learns prefix-level trajectory risk states from the hidden representations of an observer LLM, and it is suggested that these risk states can help train a safer agent, highlighting the broader potential of proactive auditing for long-horizon agent safety.

Jia-Qian Li, Yanshu Li, Bo-Xuan Zhang et al. · 6 citations
#artificial intelligence Preprint Sep 2026

Reflect, Revise, Reuse: Training-Free Skill Evolution for GUI Agents

This work proposes EvoSkill-GUI, a training-free framework in which each skill is a structured multi-file package containing retrieval metadata, executable plans, backup localization, failure-recovery rules, accessibility utilities, and failure cases.

Bo-Fan Chen, Bo-Xuan Zhang, Fei Tang et al. · 2 citations

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