Papooch/WasteOptimiser ? reverse-engineered prompt

Build me a Python app for nesting irregular 2D shapes so I can optimize material use for CNC or g code jobs.

I want a simple GUI where I can load a folder of g code files, see the valid shapes, choose how many of each one to place, and then run an optimizer that lays them out inside a workspace. Let me set the board size, spacing from the edge, spacing between parts, and a preferred starting area. I also need a way to add and remove forbidden holes in the workspace.

Please include the smarter nesting method when possible, but also make sure there is a fallback mode that works without the slower external library. It should be able to rotate parts, optionally use a part’s convex hull, and have a local improvement step to try tighter packing.

I’d also like a small Python API so the same logic can be used from a script, plus export and import of saved workspaces. If you need to check current docs for any dependency details, go ahead and look them up online.