@Hendrik Peter we've been there in the past ! It happens occassionally. Repeating what I've said, I'm a big believer in it being the responsibility of the listener to listen carefully.

essentially JSON-Schemas : https://github.com/ssbc?q=schema

I personally think ssb-msgs needs deprecating. I don't think it's much used, and if it is then I think it needs to be split out into different domains, rather than the all-encompassing "msgs"