The goal of decoder is to decode coded and perhaps cryptical variables to more understandable descriptive labels.
You can install the released version of decoder from CRAN with:
install.packages("decoder")
And the development version from GitHub with:
# install.packages("pak")
# pak::pkg_install("eribul/decoder")
install.packages("decoder", repos = c('https://eribul.r-universe.dev', 'https://cloud.r-project.org'))