To cite package ‘regexplain’ in publications use:

  Aden-Buie G (2024). _regexplain: Rstudio Addin to Explain, Test and
  Build Regular Expressions_. R package version 0.2.2.9000,
  <https://github.com/gadenbuie/regexplain>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {regexplain: Rstudio Addin to Explain, Test and Build Regular Expressions},
    author = {Garrick Aden-Buie},
    year = {2024},
    note = {R package version 0.2.2.9000},
    url = {https://github.com/gadenbuie/regexplain},
  }