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Guo-Xi Zhang

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Preprint Aug 2026

Beyond Forgetting: Diagnosing and Harnessing Shared Reasoning in Continual RLVR

This work introduces Continual Prompt Replay (CPR), which harnesses shared reasoning to improve learning on the arriving and future tasks by replaying previous-task prompts and regenerating their responses with the current policy.

Li-Rui Luo, Guo-Xi Zhang, Hong-Ming Xu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

AgentBoundary: Counterfactual Evaluation of Safety in Tool-Using LLM Agents

This work introduces AgentBound, the first four-way counterfactual generation-and-evaluation framework for tool-using agent safety, and shows that effective agentic alignment requires action decisions to track permission-relevant execution evidence, rather than refusal strength alone.

Tian-Zhuo Yang, Zi-Rui Mi, Yan-Tao Huang et al. · 1 citation
#machine learning Preprint Aug 2026

Continual Reasoning Gym: Diagnosing and Harnessing Shared Reasoning in Continual RLVR

Reinforcement learning with verifiable rewards (RLVR) commonly post-trains reasoning models on multiple tasks, while rerunning multitask RLVR (MTRL) as new tasks are added makes capability expansion costly. We therefore study continual RLVR, which updates the existing model as each task arrives. The central question is...

Lirui Luo, Guo-Xi Zhang, Hong-Ming Xu et al. · 0 citations
Jul 2026

UniLM-Nav: A Unified Framework for Zero-Shot Last-Mile Navigation

UniLM-Nav decomposes last-mile navigation into view selection, task-conditioned affordance grounding, and geometry-aware base-pose reasoning, all resolved with a shared multimodal large language model (MLLM) backend, which outperforms the previous state-of-the-art method, MoTo, on the OVMM benchmark.

Zhuofan Zhang, Tian-Xu Wang, Guo-Xi Zhang et al. · 1 citation

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