To cite package ‘rprojroot’ in publications use:

  Müller K (2026). _rprojroot: Finding Files in Project
  Subdirectories_. R package version 2.1.1.9006,
  <https://github.com/r-lib/rprojroot>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rprojroot: Finding Files in Project Subdirectories},
    author = {Kirill Müller},
    year = {2026},
    note = {R package version 2.1.1.9006},
    url = {https://github.com/r-lib/rprojroot},
  }