@maiyannah It's a hard problem. I work with browsers, and interoperability/compatibility is a huge topic of discussion. One project we started too late was a shared test suite (https://github.com/w3c/web-platform-tests). Maybe the federation needs some sort of equivalent to the W3C/WHATWG.
@nolan @maiyannah I don't know if https://www.w3.org/community/ostatus/ is entirely defunct or if it is just 5 years dormant. It's possible someone could just step in, talk to the right people, and make things happen there.