Out of curiosity, I looked at the PSGI/Plack website and made an amusing discovery.

Many years ago, before I "discovered" Perl, I wrote a webserver in AWK. It wasn't purely in AWK; I wrote a C program to listen for and accept incoming HTTP connections. It then read the request and "parsed" it into an array of name/value pairs, then exec'd AWK, using the array as the environment pointer.

Seems I "invented" "ASGI". Not the same as PSGI, but very close.