To cite package ‘circle’ in publications use:

  Schratz P (2026). _circle: R Client Package for Circle CI_. R package
  version 0.7.4, <https://github.com/ropensci/circle>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {circle: R Client Package for Circle CI},
    author = {Patrick Schratz},
    year = {2026},
    note = {R package version 0.7.4},
    url = {https://github.com/ropensci/circle},
  }