eryar/PipeCAD ? reverse-engineered prompt

Build me a desktop app for plant piping design that lets users model grids, equipment, structures, and piping in one place. I want a clean interface where someone can create a project, place components in 3D, and then generate piping isometric drawings, draft drawings, and an MTO list from the model.

Please include a simple sample project I can open right away, plus a way to customize behavior with Python scripts or plugins. Keep it practical for an engineer who wants to lay out piping and get drawings and quantities out of it. If you need to, look up current docs online for any missing details about common piping design workflows.