@article{phgpopheromoneguidedpolicyoptimizationfo,
  title = {PhGPO: Pheromone-Guided Policy Optimization for Long-Horizon Tool Planning},
  author = {Yu Li and Guangfeng Cai and Shengtian Yang and Han Luo and Shuo Han and Xu He and Dong Li and Lei Feng},
  year = {2026},
  eprint = {2602.13691},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2602.13691},
}