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Author

Yuanchen Bei

6 papers indexed here

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Review Aug 2026

Graph Engineering in the Era of LLM Agents: From Individual Intelligence to System Intelligence

Graph Engineering is introduced, an emerging paradigm for next-generation agent systems that provides a unified foundation for organizing complex objectives, orchestrating heterogeneous agents, modeling system dynamics, and enabling scalable agent evolution.

Yuyuan Feng, Zhi-Shang Xiang, Chao Yang et al. · 4 citations
#artificial intelligence Preprint Sep 2026

PolicyMem: Geometric Policy Memory for LLM Governance

PolicyMem is introduced, a geometric policy memory that externalizes natural-language policies as reusable geometric memory objects represented by low-rank subspaces in a shared representation space that achieves state-of-the-art unsafe behavior detection while enabling effective policy attribution, rewriting, and post...

Yuan-Chen Bei, Zheng-Zhang Chen, Yan-Jun Zhao et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Predict, Don't Iterate: Efficient Adaptive-Length Infilling for Diffusion Language Models

PILL (Probing-based InfiLling with preset-Length-free decoding), an efficient infilling method for DLMs that requires no preset initial length and adds far fewer extra forward passes than baselines, substantially reducing inference time is proposed.

Hao-Bo Xu, Si-Rui Chen, Yuanchen Bei et al. · 3 citations
Preprint Aug 2026

Beyond LLM-Based Reasoning: Lightweight GNNs for Agent Failure Attribution

AFANet is introduced, a lightweight graph-based framework that models interaction trajectories through step-level semantic signals and agent-level relationships and suggests that effective agent failure attribution does not require heavy LLM reasoning and a lightweight, structured approach can achieve strong performanc...

Ting-Wei Li, Yuan-Chen Bei, Xiao Lin et al. · 1 citation
#machine learning Preprint Aug 2026

EvoHarness-RL: Learning Self-Evolving Runtime Harness for Long-Horizon LLM Agents

EvoHarness-RL is introduced, which exposes Belief, Progress, and Experience (BPE) as policy-facing harness state and reveals two key dynamics: harness annealing, where training internalizes recurring harness-use patterns into the model policy and shifts the agent from frequent harness calls toward selective external-st...

Xuying Ning, Dongqi Fu, Tianxin Wei et al. · 0 citations

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