@inproceedings{qi-etal-2026-hipo,
    title = "{HIPO}: A Hierarchical Prompt Optimization Framework with Task Awareness and Fine-Grained Debugging",
    author = "Qi, Lu  and
      Chai, Lei  and
      Yu, Hongrui  and
      Qi, Binhang  and
      Sun, Hailong",
    editor = "Liakata, Maria  and
      Moreira, Viviane P.  and
      Zhang, Jiajun  and
      Jurgens, David",
    booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {ACL} 2026",
    month = jul,
    year = "2026",
    address = "San Diego, California, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-acl/2026.findings-acl.996/",
    pages = "19928--19947",
    ISBN = "979-8-89176-395-1"
}