A new R package, cffr, has beendeveloped,peer-reviewed byrOpenSci and accepted by CRAN. Thispackage has a single purpose: to create a valid CITATION.cff file using themetadata of any R package.CITATION.cff files and why they matter A Citation File Format (CFF) is aplain text file with human- and machine-readable citation information forsoftware (and datasets) ¹ . Under the hood, a CFF file is a YAML file.