Hello All,
I just wrote a fedora messaging operator proposal: https://fedoraproject.org/wiki/Proposal:_Fedora_Messaging_Publisher_Operator
The operator scope is limited to publish messages to fedora-messaging no external message schemas (for now).
I would welcome anyone who is interested in it as well, even if you are not familiar with operator development, I would be more than happy to work together with anyone who wants to get started with operator development :-)