Supplementary utils for CRAN maintainers and R packages developers. Validating the library or packages. Exploring a complexity of a specific package like evaluating sizes in bytes of all its dependencies. Assessing the life duration of a specific package version. Checking a CRAN package check page status for any errors and warnings. Retrieving a DESCRIPTION or NAMESPACE file for any package version. Comparing DESCRIPTION or NAMESPACE files between different package versions. Getting a list of all releases for a specific package. The Bioconductor is partly supported.