To cite package ‘interfacer’ in publications use:

  Challen R (2025). _interfacer: Define and Enforce Contracts for
  Dataframes as Function Parameters_. R package version 0.3.3, ,
  <https://github.com/ai4ci/interfacer>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {interfacer: Define and Enforce Contracts for Dataframes as Function
Parameters},
    author = {Robert Challen},
    year = {2025},
    note = {R package version 0.3.3, 
},
    url = {https://github.com/ai4ci/interfacer},
  }