@inproceedings{shi-etal-2026-memories,
    title = "Not All Memories Are Equal: Hierarchical Collaborative Memory for Validity-Aware Retrieval in {LLM} Agents",
    author = "Shi, Yufei  and
      Yao, Rujing  and
      Li, Ang  and
      Wu, Yang  and
      Jiang, Zhuoren  and
      Liu, Xiaozhong",
    editor = "Lee, Hung-Yi  and
      Dev, Sunipa  and
      Li, Jessy  and
      Elliott, Desmond",
    booktitle = "Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing",
    month = oct,
    year = "2026",
    address = "Budapest, Hungary",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2026.emnlp-main.2551/",
    doi = "10.18653/2026.emnlp-main.2551",
    pages = "58002--58015",
    ISBN = "979-8-89176-459-0"
}