To cite package ‘contractr’ in publications use:

  Goel A, Krikava F, Turcotte A (2026). _contractr: Run-Time Type
  Contracts for R Functions_. R package version 0.0.0.9000,
  <https://github.com/prl-prg/contractr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {contractr: Run-Time Type Contracts for R Functions},
    author = {Aviral Goel and Filip Krikava and Alexi Turcotte},
    year = {2026},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/prl-prg/contractr},
  }