Super interesting. Thanks. AutoLisp was both a pain and underrated. But, it was perfect for this sort of stuff. Much easier than generating the dxf files directly, say using postscript ;-). I love the modern recreations and UI.

Thanks! You nailed it - AutoLISP was the right abstraction. Direct DXF/PostScript meant entity tables and coordinate gymnastics. (command "LINE" p1 p2) just did the thing. What's running here: real WASM interpreter executing AutoLISP, not a slideshow. SVG native, DXF export (AC1009), all text editable, JSON data feed instead of CSV. My brother could open this page and start working the same workflow we did in '91 - better feed, better output. And Rust is a surprisingly natural fit - Lisp's explicit stack discipline maps cleanly onto ownership. What Rust enforces, Lisp already wants.