For the full release notes, see the Changelog.
Katello 3.13 provides setting System Purpose attributes on Activation Keys in the UI. Additionally, the Hammer CLI supports setting System Purpose attrbutes on Activation Keys and Content Hosts.
Katello 3.13 introduces support for HTTP proxies for content syncing. Repositories may be assigned an HTTP proxy policy: a global default, no proxy, or specify a proxy. HTTP proxy policies can be applied through bulk actions at the product level. Documentation regarding HTTP proxy support can be found here.
Content View descriptions may now be updated via the Hammer CLI.
Katello 3.13 provides the ability to upload SRPMs via the API and through Hammer and Katello to correctly identify the content as a source RPM.
Katello 3.13 includes 77 bug fixes, which can be seen here