Ah, the muscle memory comes back fast.

>The port was directed by a human, implemented by Claude Opus 5.5, and designed by both.

This is certainly one area where I find AI tools to be largely beneficial. There are so many pieces of near-forgotten software that are difficult to interface with at all, let alone to decompile, debug and port and so on. I was thinking lately how useful an AI-powered editor for NES- and SNES-era games would be. The existing tile and mapper editors are generally pretty clunky IIRC.