most of that is trivial to get around by claiming permission. really.

"X license disallows this current use without express permission"

"Z gave me permission , here's the pdf, they gave us permission regardless of what licensing says going forward."

<insert pdf generated from a text file that says "I'm Z and I gave permission.">

"Okay, we will continue forward while noting that Z gave us permission regardless of what licensing says going forward."

I haven't tried it but if you separated it into two steps: decompile and describe, then implement from the specs, that looks like clean room reverse engineering, which is perfectly legal in the US