To cite package ‘optree’ in publications use:

  Zheng B (2026). _optree: Hierarchical Runtime Configuration
  Management_. R package version 0.1.1,
  <https://github.com/byzheng/optree>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {optree: Hierarchical Runtime Configuration Management},
    author = {Bangou Zheng},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/byzheng/optree},
  }