Catalog reporter generates reports based on changes to the catalogs in a munki repository. It currenlty is able to report to MSTeams via webhook. It displays: Title, Version, Catalogs and opt. Icon
Python3 with module plistlib (Munki's bundled python contains all requirements)
The tool has a --help option
I might look into Slack compatiblity and output as JSON option.
Also check out the munki software packages it the subdirectory!