I want a lightweight Gen-AI application that lets me write a plain-language prompt and instantly receive a fully populated Autodesk Civil 3D site plan. The generated drawing must respect standard Civil 3D objects and styles and include road-design elements such as intersections, roundabouts, and complete drainage systems exactly as described in the prompt. The flow I’m after is simple: I type something like “Create a 500 m collector road with two T-intersections, one central roundabout, and a curb-and-gutter drainage network that ties into the existing surface,” press enter, and Civil 3D builds the geometry for me. No manual drawing—everything should appear as polylines, alignments, corridors, surfaces, and pipe networks ready for refinement. Core expectations • Natural-language parsing that understands location, dimensions, and design intent • Direct interaction with the Civil 3D API so output arrives as a native .DWG (no intermediary DXF scripts) • Parameter handling for road width, curve radius, grading slopes, pipe sizes, and similar variables • Clean, editable objects that follow Civil 3D best practices (labels, layers, styles) • A short video or live demo proving the workflow from prompt to finished site plan Hand-over items • Source code with clear comments and a brief README on setup and required dependencies • A compiled add-in or script ready to load in Civil 3D 2024 (earlier versions acceptable if noted) • One sample prompt plus its resulting .DWG to confirm intersections, roundabouts, and drainage components generate correctly If you’ve already worked with the Autodesk Civil 3D .NET or Python API and have experience in NLP or transformer models, this should feel straightforward. Let me know which tech stack you’d use and any similar automations you’ve built—especially ones involving site plans or transportation features.