# CAD Viewer Development Use this reference only when the user asks to modify, debug, or iterate on CAD Viewer source. CAD Viewer source development happens in the root source workspace, not inside this generated skill runtime. If you are not currently working directly in the editable source workspace, ask the user for the correct checkout and run the agent from that repository. Once inside the repository, read root `AGENTS.md` for guidance on modifying and running the Viewer.