@article{modularpromptoptimizationoptimizingstruc,
  title = {Modular Prompt Optimization: Optimizing Structured Prompts with Section-Local Textual Gradients},
  author = {Prith Sharma and Austin Z. Henley},
  year = {2026},
  eprint = {2601.04055},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.04055},
}