As PSR-13 is stating, there is no single common hypermedia format.
Instead of trying to improve the existing one, why not create a new one
where we put all the guess-work to rest?
RPC response codes, REST response codes and everything in between has no
real standard.
I struggle every day with making up a "standard" for REST and RPC
between PHP and Java developers.
At that point we need to think about all the other consumers. Maybe I am
way off...anyway, I like the approach and would appreciate any
standardized solution.
Just adding my 2 cents...