Most of the good stuff came up from William Alsup's opinions in the District Court. He spent a significant amount of time teaching himself programming in order to fully understand what an API is, came to a correct understanding, then wrote that into his opinions.

That gets quoted a lot in the SC decision, and then Breyer messed it up a bit but basically agreed with it.

All points to Alsup. https://en.wikipedia.org/wiki/William_Alsup#Notable_cases