progressr 0.13.0 is on CRAN. In the recent releases, progressr gained support for using cli to generate progress bars. Vice versa, cli can now report on progress via the progressr framework. Here are the details. For other updates to progressr, see NEWS.
The progressr package, part of the futureverse, provides a minimal API for reporting progress updates in R. The design is to separate the representation of progress updates from how they are presented.