Hello Everyone, TC defined a tag for API interoperability (cover both stable and compatible APIs) called 'assert:supports-api-interoperability' which assert on API won’t break any users when they upgrade a cloud or start using their code on a new OpenStack cloud. Basically, Projects will not change (or remove) an API in a way that will break existing users of an API. We have updated the tag documentation to clarify its definition and requirements. If your projects follow the API interoperability guidelines[1] and some API versioning mechanism that does not need to be microversion then you should start thinking to apply for this tag. The complete requirement can be found here[2]. Currently, only nova has this tag but I am sure many projects are eligible for this, and TC encourage them to apply for this. [1] https://specs.openstack.org/openstack/api-wg/guidelines/api_interoperability... [2] https://governance.openstack.org/tc/reference/tags/assert_supports-api-inter... -gmann