If anyone's interested, here's a pretty good overview of Infocom's internal development tooling (how they got from the ZIL source code to a compiled story file). https://github.com/ZoBoRf/ZILCH-How-to
Additionally, this site is a really cool visualization that lets you play Zork while being able to see its internal game state and the corresponding source code to where you currently are. https://eblong.com/infocom/visi-zork1/