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Xin Cong

22 accepted papers

2025

AgentRM: Enhancing Agent Generalization with Reward Modeling

ACL 2025long

Existing LLM-based agents have achieved strong performance on held-in tasks, but their generalizability to unseen tasks remains poor. Hence, some recent work focus on fine-tuning the policy model with more diverse tasks to improve the generalizability. In this work, we find that finetuning a reward…

2025

Distance between Relevant Information Pieces Causes Bias in Long-Context LLMs

ACL 2025finding

Positional bias in large language models hinders their ability to effectively process long inputs. A prominent example is the “lost in the middle” phenomenon, where LLMs struggle to utilize relevant information situated in the middle of the input. While prior research primarily focuses on single pie…

2025

Enhancing Open-Domain Task-Solving Capability of LLMs via Autonomous Tool Integration from GitHub

ACL 2025long

Large Language Models (LLMs) excel in traditional natural language processing tasks but struggle with problems that require complex domain-specific calculations or simulations. While equipping LLMs with external tools to build LLM-based agents can enhance their capabilities, existing approaches lack…

2025

Generalizing Experience for Language Agents with Hierarchical MetaFlows

NeurIPS 2025poster

Recent efforts to employ large language models (LLMs) as agents have demonstrated promising results in a wide range of multi-step agent tasks. However, existing agents lack an effective experience reuse approach to leverage historical completed tasks. In this paper, we propose a novel experience reu…

Cited by 0SourceScholar
2025

Learning Evolving Tools for Large Language Models

ICLR 2025poster

Tool learning enables large language models (LLMs) to interact with external tools and APIs, greatly expanding the application scope of LLMs. However, due to the dynamic nature of external environments, these tools and APIs may become outdated over time, preventing LLMs from correctly invoking tools…

2025

Learning to Generate Structured Output with Schema Reinforcement Learning

ACL 2025long

This study investigates the structured generation capabilities of large language models (LLMs), focusing on producing valid JSON outputs against a given schema. Despite the widespread use of JSON in integrating language models with programs, there is a lack of comprehensive analysis and benchmarking…

2025

Proactive Agent: Shifting LLM Agents from Reactive Responses to Active Assistance

ICLR 2025poster

Agents powered by large language models have shown remarkable abilities in solving complex tasks. However, most agent systems remain reactive, limiting their effectiveness in scenarios requiring foresight and autonomous decision-making. In this paper, we tackle the challenge of developing proactive…

2025

Rational Decision-Making Agent with Learning Internal Utility Judgment

ICLR 2025poster

With remarkable advancements, large language models (LLMs) have attracted significant efforts to develop LLM-based agents capable of executing intricate multi-step decision-making tasks. Existing approaches predominantly build upon the external performance measure to guide the decision-making proces…

Cited by 0SourcePDFScholar
2025

WorkflowLLM: Enhancing Workflow Orchestration Capability of Large Language Models

ICLR 2025poster

Recent advancements in large language models (LLMs) have driven a revolutionary paradigm shift in process automation from Robotic Process Automation to Agentic Process Automation by automating the workflow orchestration procedure based on LLMs. However, existing LLMs (even the advanced OpenAI GPT-4o…

2024

AgentVerse: Facilitating Multi-Agent Collaboration and Exploring Emergent Behaviors

ICLR 2024poster

Autonomous agents empowered by Large Language Models (LLMs) have undergone significant improvements, enabling them to generalize across a broad spectrum of tasks. However, in real-world scenarios, cooperation among individuals is often required to enhance the efficiency and effectiveness of task acc…

2024

ChatDev: Communicative Agents for Software Development

ACL 2024long

Software development is a complex task that necessitates cooperation among multiple members with diverse skills. Numerous studies used deep learning to improve specific phases in a waterfall model, such as design, coding, and testing. However, the deep learning model in each phase requires unique de…

2024

DebugBench: Evaluating Debugging Capability of Large Language Models

ACL 2024findings

Large Language Models (LLMs) have demonstrated exceptional coding capability. However, as another critical component of programming proficiency, the debugging capability of LLMs remains relatively unexplored. Previous evaluations of LLMs’ debugging ability are significantly limited by the risk of da…

2024

Experiential Co-Learning of Software-Developing Agents

ACL 2024long

Recent advancements in large language models (LLMs) have brought significant changes to various domains, especially through LLM-driven autonomous agents. A representative scenario is in software development, where LLM agents demonstrate efficient collaboration, task division, and assurance of softwa…

2024

MatPlotAgent: Method and Evaluation for LLM-Based Agentic Scientific Data Visualization

ACL 2024findings

Scientific data visualization plays a crucial role in research by enabling the direct display of complex information and assisting researchers in identifying implicit patterns. Despite its importance, the use of Large Language Models (LLMs) for scientific data visualization remains rather unexplored…

2024

RepoAgent: An LLM-Powered Open-Source Framework for Repository-level Code Documentation Generation

EMNLP 2024system demonstrations

Generative models have demonstrated considerable potential in software engineering, particularly in tasks such as code generation and debugging. However, their utilization in the domain of code documentation generation remains underexplored. To this end, we introduce RepoAgent, a large language mode…

2024

Tell Me More! Towards Implicit User Intention Understanding of Language Model Driven Agents

ACL 2024long

Current language model-driven agents often lack mechanisms for effective user participation, which is crucial given the vagueness commonly found in user instructions. Although adept at devising strategies and performing tasks, these agents struggle with seeking clarification and grasping precise use…

2024

ToolLLM: Facilitating Large Language Models to Master 16000+ Real-world APIs

ICLR 2024spotlight

Despite the advancements of open-source large language models (LLMs), e.g., LLaMA, they remain significantly limited in tool-use capabilities, i.e., using external tools (APIs) to fulfill human instructions. The reason is that current instruction tuning largely focuses on basic language tasks but ig…

2023

Universal Information Extraction with Meta-Pretrained Self-Retrieval

ACL 2023findings

Universal Information Extraction (Universal IE) aims to solve different extraction tasks in a uniform text-to-structure generation manner. Such a generation procedure tends to struggle when there exist complex information structures to be extracted. Retrieving knowledge from external knowledge bases…

2022

Document-Level Event Extraction via Human-Like Reading Process

ICASSP 2022accepted

Document-level Event Extraction (DEE) is particularly tricky due to the two challenges it poses: scattering-arguments and multi-events. The first challenge means that arguments of one event record could reside in different sentences in the document, while the second one reflects that one document ma…

Cited by 0SourceScholar
2022

Enhancing Chinese Pre-trained Language Model via Heterogeneous Linguistics Graph

ACL 2022long

Chinese pre-trained language models usually exploit contextual character information to learn representations, while ignoring the linguistics knowledge, e.g., word and sentence information. Hence, we propose a task-free enhancement module termed as Heterogeneous Linguistics Graph (HLG) to enhance Ch…

2022

Event Causality Extraction with Event Argument Correlations

COLING 2022main

Event Causality Identification (ECI), which aims to detect whether a causality relation exists between two given textual events, is an important task for event causality understanding. However, the ECI task ignores crucial event structure and cause-effect causality component information, making it s…

2021

Enhanced Language Representation with Label Knowledge for Span Extraction

EMNLP 2021main

Span extraction, aiming to extract text spans (such as words or phrases) from plain text, is a fundamental process in Information Extraction. Recent works introduce the label knowledge to enhance the text representation by formalizing the span extraction task into a question answering problem (QA Fo…