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I like the idea of an OpenSCAD for diagramming. Rather surprised it didn't exist already.

It has since at least 1991 when Graphviz was first released.

https://en.wikipedia.org/wiki/Graphviz

An even earlier tool: Pic, which had its paper released in 1981. It belongs to the troff ecosystem of tools. I'd be interested to know about other tools from this era!

Paper: https://dl.acm.org/doi/10.1145/872730.806459

Mention in troff doc: https://www.troff.org/prog.html#pic

Wikipedia page: https://en.wikipedia.org/wiki/PIC_(markup_language)

Pikchr is a modern implementation of PIC (with some nice new features) from Sqlite/Fossil!

https://pikchr.org/home/doc/trunk/homepage.md

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