@article{hiflowhierarchicalfeedbackdrivenoptimiza,
  title = {HiFlow: Hierarchical Feedback-Driven Optimization for Constrained Long-Form Text Generation},
  author = {Yifan Zhu and Guanting Chen and Bing Wei and Haoran Luo},
  year = {2026},
  eprint = {2603.04996},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2603.04996},
}