To cite package ‘gghighlight’ in publications use:

  Yutani H (2024). _gghighlight: Highlight Lines and Points in
  'ggplot2'_. R package version 0.4.1.9000, ,
  <https://github.com/yutannihilation/gghighlight>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gghighlight: Highlight Lines and Points in 'ggplot2'},
    author = {Hiroaki Yutani},
    year = {2024},
    note = {R package version 0.4.1.9000, 
},
    url = {https://github.com/yutannihilation/gghighlight},
  }