To cite package ‘checker’ in publications use:

Telford R (2023). checker: Checks 'R' Configuration Set Up Correctly Before Class. R package version 0.1.3, https://github.com/richardjtelford/checker.

Corresponding BibTeX entry:

  @Manual{,
    title = {checker: Checks 'R' Configuration Set Up Correctly Before
      Class},
    author = {Richard J. Telford},
    year = {2023},
    note = {R package version 0.1.3},
    url = {https://github.com/richardjtelford/checker},
  }