Hanwen Gu
Author directory2026
SKILL-DISCO: Distilling and Compiling Agent Traces into Reusable Procedural Skills
Zhongxin Guo | Danrui Qi | Hanwen Gu | Peng Cheng | Yongqiang Xiong
Findings of the Association for Computational Linguistics: EMNLP 2026
Zhongxin Guo | Danrui Qi | Hanwen Gu | Peng Cheng | Yongqiang Xiong
Findings of the Association for Computational Linguistics: EMNLP 2026
Agents often repeatedly solve similar task instances from scratch, leading to unnecessary reasoning cost and long execution traces. Prior work has explored workflow reuse and executable skill induction, but it remains unclear which task scenarios admit procedural skills and how the shared procedural structure should be represented across successful traces. We study this problem in FSM-defined scenarios, where successful traces can be viewed as paths through partially observed instance-level transition graphs, and formulate procedural skills as reusable parameterized control-flow subgraphs. Based on this view, we introduce SkillDisCo, a distillation-and-compilation framework that distills reusable PFSM subgraphs from successful traces and compiles them into callable, executable, and verifiable procedural skills. Experiments on ALFWorld and WebArena show that SkillDisCo improves success rates and reduces agent turns across benchmarks and model scales, demonstrating the benefits of representing shared experience as reusable execution structures
Planning Beyond Text: Graph-based Reasoning for Complex Narrative Generation
Hanwen Gu | Chao Guo | Junle Wang | Wenda Xie | Yisheng Lv
Findings of the Association for Computational Linguistics: ACL 2026
Hanwen Gu | Chao Guo | Junle Wang | Wenda Xie | Yisheng Lv
Findings of the Association for Computational Linguistics: ACL 2026
While LLMs demonstrate remarkable fluency in narrative generation, existing methods struggle to maintain global narrative coherence, contextual logical consistency, and smooth character development, often producing monotonous scripts with structural fractures. To this end, we introduce PLOTTER, a framework that performs narrative planning on structural graph representations instead of direct sequential text representations in existing work. Specifically, PLOTTER executes the Evaluate-Plan-Revise cycle on the event graph and character graph. By diagnosing and repairing issues of the graph topology under rigorous logical constraints, the model optimizes the causality and narrative skeleton before complete context generation. Experiments demonstrate that PLOTTER significantly outperforms representative baselines across diverse narrative scenarios. These findings verify that manipulating narrative planning on structural graph representations—rather than direct text representations—is crucial to enhance the long-context reasoning of LLMs in complex narrative generation.
2025
UMAD: Enhancing LLM Debiasing via Multi-Agent Debate and Token-Level Bias Interpretation
Hanwen Gu | JieMa JieMa | Ying Qin | Ling Hu
Proceedings of the 24th China National Conference on Computational Linguistics (CCL 2025)
Hanwen Gu | JieMa JieMa | Ying Qin | Ling Hu
Proceedings of the 24th China National Conference on Computational Linguistics (CCL 2025)
“Textual data often contain biases that compromise fairness in AI systems, particularly in sensitive areas such as gender, race, and politics. While large language models (LLMs) have shown success across various tasks, they still face limitations due to inherent biases within the model sand restrictive safety policies that hinder direct bias mitigation. To overcome these challenges,we propose UMAD (Unsupervised Multi-Agent Debate), a novel framework that leverages aMulti-Agent Debate mechanism alongside Best-Worst Scaling (BWS) to foster more effective discussions among LLMs, facilitating the identification of biases. By combining this with gradient-based interpretation techniques, UMAD extracts token-level bias insights, which are then integrated into models using in-context learning. This enhances the debiasing performance, as shown by our experiments across three bias categories—gender, religion, and politics—using five different LLMs. Our approach demonstrates significant improvements in metrics, with large models matching or even surpassing GPT-4 in Style Accuracy (STA). We release our code at:https://github.com/Couen/UMAD.git.”