To cite package ‘todotxt’ in publications use:

  Henderson M (2024). _todotxt: Parse todo.txt files_. R package
  version 0.1.0, <https://github.com/mhenderson/todotxt>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {todotxt: Parse todo.txt files},
    author = {Matthew Henderson},
    year = {2024},
    note = {R package version 0.1.0},
    url = {https://github.com/mhenderson/todotxt},
  }