PrachiDashrath/cad-drafting-ai ? reverse-engineered prompt

Build me a Python app for AI assisted CAD drafting that can take a simple 3D model and turn it into clean 2D engineering drawings.

I want a basic desktop style interface where I can load or view a model, see the 3D part, generate 2D projections, and automatically add sensible dimensions and annotations. It should also let me organize the drawing on a sheet with a title block and standard layout, then export the result to common formats like DXF, STEP, IGES, SVG, and PDF.

Please keep the code clean and modular so the geometry, projection, drawing, viewer, and export parts are separated in a sensible way. If you need current library details or best practices, look them up online. Also include a few sample templates or test data so I can try it right away, and make sure there are tests for the main behavior.