Bootstrapping XML schema definitions with Claude Opus 4.6: A case study (the good, the bad, and the ugly)

Being able to support legacy formats like XSD would be great for the Haskell ecosystem, as it would let us do a lot more industrial stuff. Nobody’s ever quite got around to doing it by hand, so if AI can fill in these legacy formats that would be quite powerful. From a bootstrappable builds perspective, the idea that one would bootstrap the XSD parser and then throw away your bootstrap chain worries me. Haskell is a remarkably stable language given the pace of development at the frontier, and it seems that you could keep that around without too much additional effort.