cad-operations

name cad-operations description Unified local CAD operations skill for creating, editing, validating, and exporting CAD deliverables. Use when the user asks for CAD/DWG/DXF/PDF/SVG/PNG drafting, AutoCAD/Core Console, FreeCAD/FreeCAD MCP, SolidWorks/SolidWorks MCP/COM/VBA/C# automation, SLDPRT/SLDASM/STEP/STL files, electrical main single-line diagrams/电气主接线图/一次接线图/SLD, pavement structure drawings/路面结构图, or any local CAD workflow that should use installed CAD tools, scripts, and MCP assets. CAD Operations Purpose Use this as a single entry point for CAD work. Route each task to the narrowest reproducible workflow, prefer generated/interchange files before manual edits, and verify outputs with live files or rendered previews before delivery. First decisions Identify the CAD family Electrical main wiring / SLD / 变电站主接线 / 一次接线图 → read references/electrical-main-sld.md , use scripts/make_main_sld.py . Pavement / road layer cross-section / 路面结构图 → read references/pavement-structure-cad.md , use scripts/generate_pavement_cad_ezdxf.py . SolidWorks parts, assemblies, drawings, STEP/STL/SLDPRT/SLDASM, feature creation, mates, rebuilds → read references/solidworks-mcp.md . Generic 2D DWG/DXF editing, plotting, conversion, or AutoCAD/FreeCAD use → read references/autocad-freecad.md . Unsure or environment-sensitive → read references/local-cad-environment.md . Choose the output source of truth Prefer DXF for editable 2D CAD interchange. Prefer SLDPRT/SLDASM/SLDDRW for native SolidWorks work, then export STEP/STL/DXF/PDF as requested. Use PDF/SVG/PNG previews for review; do not rely on DXF syntax alone for layout correctness. DWG is proprietary: generate/modify DXF first, then convert or save as DWG through AutoCAD/ODA/LibreCAD/SolidWorks when explicitly required. Keep work reproducible Create specs/scripts in the active workspace, not in the skill directory. Keep originals separate from generated files. Prefer editing a JSON spec or script and regenerating rather than hand-patching many coordinates. For destructive edits to native CAD files, save a copy/backup first unless the user explicitly requests in-place modification. Quick commands Electrical SLD: python scripts/make_main_sld.py examples/electrical_sld_spec.json --outdir output/sld --stem main_sld Pavement structure DXF: python scripts/generate_pavement_cad_ezdxf.py examples/pavement_structure_spec.json --out output/pavement Open a generated CAD file in AutoCAD when configured: & $env:AUTOCAD_EXE "output\pavement\pavement_structure.dxf" Start a local SolidWorks MCP server for diagnostics when installed: Set-Location -LiteralPath $env:SOLIDWORKS_MCP_HOME & ".\.venv\Scripts\python.exe" -m solidworks_mcp.server Verification rules Before final response on any CAD deliverable: Confirm every requested output file exists and is non-empty. For DXF, validate with ezdxf.readfile when possible. For PDF/SVG/PNG, render or inspect the latest preview when visual layout matters. For SolidWorks, require live rebuild/status evidence plus saved native/export files; mock-mode MCP results are not engineering truth. Report exact paths and any assumptions about units, dimensions, standards, topology, or missing source data. Bundled resources scripts/make_main_sld.py — parameterized electrical main single-line diagram generator; outputs DXF/PDF/SVG. scripts/generate_pavement_cad_ezdxf.py — lightweight pavement structure DXF generator using ezdxf . scripts/generate_pavement_cad.py — dependency-light fallback pavement CAD generator. scripts/audit_sld.py — generic DXF audit helper for generated SLD drawings. references/local-cad-environment.md — environment variables, tool discovery, and MCP status checks. references/electrical-main-sld.md — SLD workflow, symbols, topology, checks. references/pavement-structure-cad.md — pavement JSON schema and workflow. references/solidworks-mcp.md — SolidWorks MCP, COM/VBA fallback, verification. references/autocad-freecad.md — AutoCAD/Core Console and FreeCAD notes.