To cite package ‘frontmatter’ in publications use:

  Aden-Buie G (2026). _frontmatter: Parse Front Matter from Documents_.
  R package version 0.3.0,
  <https://CRAN.R-project.org/package=frontmatter>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {frontmatter: Parse Front Matter from Documents},
    author = {Garrick Aden-Buie},
    year = {2026},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=frontmatter},
  }