Sounds like an interesting project maybe for specific use cases - I always liked cutting out software in the cad to CNC mix - example I really like the laser driver I have for my pretty high end / decent co2 American laser which goes straight from Coreldraw…

I also have two industrial engraving machines but don’t use them much or almost never - I could maybe contribute by trying to get my head round how they operate some day and seeing if your script output could eventually be pasted from moi or a text file straight into Mach 3…

My process for running one of those machines was coreldraw (.eps) or (.dxf) > Vectric VCarve > Mach 3

My other machine was not retrofitted has a legacy controller box and uses “engrave lab” software / dongle.

You should have a look at Vectric if you don’t already know it - does tool paths - has a visualiser and works pretty intuitively. I doubt that gives bad gcode because you can help or tweak it with your own post processor tweaks I think.

Some Vectric forum posts and HAAS arcs mentioned on one of them I believe…

https://www.google.com/search?q=vectric%20haas%20post%20processor&ie=utf-8&oe=utf-8&client=firefox-b-m

Vectric website:
https://www.vectric.com/