CAD Engineering Skill

Expert guidance on Computer-Aided Design systems, file formats, conversion technologies, and interoperability between CAD platforms.

Version Metadata

version: 1.0.0 python_min_version: '3.10' compatibility: tested_python:

• '3.10'
• '3.11'
• '3.12'
• '3.13' os:
• Windows
• Linux
• macOS

Changelog

[1.0.0] - 2026-01-07

Added:

• Initial version metadata and dependency management

• Semantic versioning support

• Compatibility information for Python 3.10-3.13

Changed:

• Enhanced skill documentation structure

When to Use

• CAD software selection and guidance

• File format conversions (DWG, DXF, STEP, IGES, etc.)

• PDF to CAD conversion strategies

• Technical drawing analysis

• 3D modeling approaches

• Open-source vs proprietary CAD decisions

• CAD automation and scripting

• Cross-platform interoperability

Agent Capabilities

This skill integrates agent capabilities from /agents/cad-engineering-specialist/ :

Open-Source CAD Expertise

Software Capabilities

FreeCAD Parametric 3D modeling, Python scripting, workbench customization

LibreCAD 2D drafting, DXF/DWG handling, command-line operations

OpenSCAD Programmatic 3D modeling, CSG operations, parametric design

QCAD Professional 2D CAD, scripting interface, batch processing

BRL-CAD Solid modeling, ray-tracing, geometric analysis

Blender CAD integration, mesh to solid conversion, technical visualization

KiCAD PCB design, electrical schematics, 3D board visualization

Proprietary CAD Knowledge

Software Capabilities

AutoCAD Full command set, AutoLISP/VBA automation, custom tools

SolidWorks Feature-based modeling, API programming, PDM integration

CATIA V5/V6 platforms, complex surfaces, PLM workflows

Inventor Parametric design, iLogic rules, Vault integration

Fusion 360 Cloud collaboration, generative design, CAM integration

Creo/Pro-E Advanced assembly, mechanism design

NX High-end manufacturing, synchronous technology

File Format Expertise

Category Formats

Native DWG, DXF, DGN, IGES, STEP, STL, SAT, Parasolid

Exchange IFC, COLLADA, OBJ, FBX, 3DS, VRML, X3D

Documentation PDF, SVG, EPS, DWF, 3D PDF

Delegation Capability

This specialist agent delegates to software-specific agents:

delegation: software_specific_agents: freecad: path: agents/freecad capabilities: - parametric_modeling - assembly_design - technical_drawings gmsh: path: agents/gmsh capabilities: - mesh_generation - finite_element_preprocessing - mesh_optimization

PDF to CAD Conversion

Conversion Strategy Selection

• Vector PDFs: Direct vector extraction

• Scanned Drawings: OCR and vectorization

• Mixed Content: Hybrid approach

• Complex Cases: Manual reconstruction

Conversion Tools

Category Tools

Commercial AutoDWG, AnyDWG, Print2CAD, Scan2CAD, pdf2cad

Open-Source Inkscape+pstoedit, potrace, autotrace, pdf2dxf

Libraries OpenCV, Tesseract OCR, CADLib, LibreDWG, TeighaFile

Cloud Services Zamzar, CloudConvert, CAD Exchanger

AI/ML Tools Deep learning drawing recognition, neural vectorization

PDF Analysis Workflow

from digitalmodel.agents.cad import PDFAnalyzer

Analyze PDF type

analyzer = PDFAnalyzer() analysis = analyzer.analyze("drawing.pdf")

print(f"PDF Type: {analysis['type']}") # vector/raster/hybrid print(f"Creation Method: {analysis['creation_method']}") print(f"Embedded Fonts: {analysis['fonts']}") print(f"Layer Info: {analysis['layers']}") print(f"Scale Detection: {analysis['detected_scale']}")

Get conversion recommendation

recommendation = analyzer.recommend_conversion() print(f"Recommended Tool: {recommendation['tool']}") print(f"Expected Accuracy: {recommendation['accuracy']}") print(f"Manual Cleanup: {recommendation['cleanup_required']}")

Conversion Quality Optimization

from digitalmodel.agents.cad import CADConverter

converter = CADConverter()

Pre-processing for scanned PDFs

converter.preprocess( input_file="scanned_drawing.pdf", operations=[ "denoise", "deskew", "contrast_enhance" ] )

Vectorization with tuned parameters

result = converter.convert( input_file="scanned_drawing.pdf", output_file="drawing.dxf", options={ "line_tolerance": 0.5, "arc_detection": True, "text_recognition": True, "dimension_extraction": True } )

Post-processing cleanup

converter.postprocess( file="drawing.dxf", operations=[ "remove_duplicates", "close_gaps", "standardize_layers" ] )

Format Conversion Examples

STEP to DXF

from digitalmodel.agents.cad import FormatConverter

converter = FormatConverter()

Convert STEP to DXF with projection

result = converter.convert( input_file="model.step", output_file="drawing.dxf", projection="front", # top, front, right, isometric scale=1.0, layer_mapping={ "visible_edges": "0", "hidden_edges": "hidden", "dimensions": "dimensions" } )

DWG Version Conversion

Convert between DWG versions

result = converter.convert( input_file="drawing_2024.dwg", output_file="drawing_2010.dwg", target_version="2010" # For compatibility )

Batch Format Conversion

from digitalmodel.agents.cad import BatchConverter

batch = BatchConverter()

Convert all STEP files to IGES

results = batch.convert_directory( input_directory="./step_files", output_directory="./iges_files", input_format="STEP", output_format="IGES", parallel=True, workers=4 )

Generate conversion report

batch.generate_report(results, "conversion_report.html")

Technical Drawing Analysis

from digitalmodel.agents.cad import DrawingAnalyzer

analyzer = DrawingAnalyzer()

Analyze technical drawing

analysis = analyzer.analyze("technical_drawing.dxf")

Extract information

print(f"Drawing Scale: {analysis['scale']}") print(f"Units: {analysis['units']}") print(f"Layers: {analysis['layers']}") print(f"Blocks: {analysis['blocks']}") print(f"Dimensions: {len(analysis['dimensions'])}") print(f"Text Annotations: {len(analysis['text'])}")

Validate against standards

validation = analyzer.validate( standard="ISO", # or "ANSI", "DIN", "JIS" checks=["layer_naming", "line_types", "dimensions"] )

MCP Tool Integration

Swarm Coordination

// Initialize CAD expertise swarm mcp__claude-flow__swarm_init { topology: "hierarchical", maxAgents: 5 }

// Spawn specialized agents mcp__claude-flow__agent_spawn { type: "analyst", name: "format-analyzer" } mcp__claude-flow__agent_spawn { type: "coder", name: "converter" } mcp__claude-flow__agent_spawn { type: "reviewer", name: "quality-checker" }

Memory Coordination

// Store conversion configuration mcp__claude-flow__memory_usage { action: "store", key: "cad/conversion/config", namespace: "cad", value: JSON.stringify({ source_format: "PDF", target_format: "DXF", method: "vectorization", accuracy_target: 0.95 }) }

Best Practices

Format Selection

• STEP: Best for 3D geometry exchange

• IGES: Legacy support, use STEP when possible

• DXF: Best for 2D CAD interoperability

• STL: 3D printing and visualization only

Conversion Quality

• Always verify dimensional accuracy after conversion

• Check for missing entities (arcs, splines, text)

• Validate layer structure preservation

• Test with small sample before batch processing

Automation

• Use Python scripting for repeatable tasks

• Create conversion templates for standard workflows

• Implement quality checks in CI/CD pipelines

• Document conversion parameters for reproducibility

Common Issues

Lossy Conversions

Check for conversion losses

losses = converter.check_losses( original="model.step", converted="model.iges" )

if losses["geometry_count_diff"] > 0: print(f"Lost {losses['geometry_count_diff']} entities") if losses["accuracy_loss"] > 0.01: print(f"Accuracy loss: {losses['accuracy_loss']*100:.1f}%")

Version Compatibility

Check format version before conversion

info = converter.get_format_info("drawing.dwg") print(f"DWG Version: {info['version']}") print(f"Created By: {info['application']}") print(f"Compatible With: {info['compatible_versions']}")

Related Skills

• freecad-automation - FreeCAD operations

• gmsh-meshing - Mesh generation from CAD

• orcaflex-modeling - Marine analysis integration

• structural-analysis - FEM preprocessing

References

• DWG/DXF Specification: Open Design Alliance

• STEP Standard: ISO 10303

• IGES Standard: ASME Y14.26M

• Agent Configuration: agents/cad-engineering-specialist/agent.yaml

Version History

• 1.0.0 (2025-01-02): Initial release from agents/cad-engineering-specialist/ configuration