To cite package ‘vbracket’ in publications use:

  Sato Y (2026). _vbracket: Custom Legends with Statistical Comparison
  Brackets_. R package version 1.4.0,
  <https://github.com/h20gg702/vbracket>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {vbracket: Custom Legends with Statistical Comparison Brackets},
    author = {Yoshiaki Sato},
    year = {2026},
    note = {R package version 1.4.0},
    url = {https://github.com/h20gg702/vbracket},
  }