Lingyue Ge @ LAMDA

Roles with Rails: Contract-Preserving Role Evolution in Multi-Agent Structured Reasoning.
Ling-Yue Ge, Lan-Zhe Guo.
arXiv 2026    [Paper] [PDF]

We propose SERO, a contract-preserving role evolution framework for multi-agent structured reasoning. Frozen role pools cannot adapt to new tasks, while unconstrained role generation breaks the implicit contracts among agents (capability, communication, validation, aggregation, and output). SERO introduces an Edit Gate that only commits role edits which preserve these contracts, allowing the multi-agent system to adapt to novel tasks while maintaining reliable coordination.

MapTab: Are MLLMs Ready for Multi-Criteria Route Planning in Heterogeneous Graphs?
Ziqiao Shang^*, Lingyue Ge^*, Zi-Jian Cheng, Shi-Yu Tian, Zhenyu Huang, Wenbo Fu, Weiming Wu, Yang Chen, Xiangwen Zhang, Yulan Hu, Bin Liu, Yu-Feng Li, Lan-Zhe Guo.
arXiv 2026    [Paper] [PDF] [Code]  (^* denotes equal contribution)

We introduce MapTab, a benchmark and systematic study examining whether multimodal large language models (MLLMs) are ready for multi-criteria route planning over heterogeneous graphs. MapTab evaluates models on planning routes that satisfy multiple, often competing criteria across visually-grounded heterogeneous map structures, revealing the strengths and limitations of current MLLMs in constraint-aware spatial planning.