I wanted a whiteboard app - simple, infinite, zoomable, scrollable svg-based area with custom shapes and elements. It just needed prompts like "add zoom", "add a rect shape", "add control points for resize", "add text shape", "make position attributes able to reference another objects properties, + basic arithmetic" (for example to make line connect 2 objects, or size of one mirror size of another, etc.). It made all of these with so little effort from me. I would never undertake such a project without an LLM.