Platform v3.0 Overview

Feature Overview

RevitDevTool v3.0 is a development platform for .NET-based CAD/BIM applications. Currently supports Revit and AutoCAD-family — designed to extend to any .NET-capable host. Iterate on automation code without rebuilding, reinstalling, or restarting the host.

Main Features

Feature	Use It When
Python execution	Data analysis, geometry processing, or quick automation with modern Python packages
Python debugging	VSCode breakpoints and variable inspection
.NET add-in execution	Faster run/test cycles for Revit/AutoCAD commands
C# / F# scripts	Quick experiments without a full project
IronPython	Compatibility with pyRevit or RevitPythonShell-style scripts
Logging panel	Readable output, errors, stack traces, formatted JSON
Geometry visualization	Temporary geometry in Revit without creating model elements
MCP integration	AI assistants interacting with live host instances
PyTest bridge	Automated tests against a live Revit, AutoCAD, or Civil 3D
Command Browser	Searchable access to Revit commands

Supported Hosts

Host	Versions	Status
Revit	2022–2027	Full support (primary experience)
AutoCAD	2022–2027	Full execution, MCP, PyTest
Civil 3D	2022–2027	Full (shares AutoCAD add-in)
Plant 3D	2022–2027	Full (shares AutoCAD add-in)

All AutoCAD-family verticals (Architecture, MEP, Electrical, Mechanical, Map 3D) are supported via the same AcadDevTool add-in.

What Changed From v2.x

• Shared platform architecture: code execution, logging, MCP, and testing are shared DevTools.* libraries — not Revit-specific code
• Multi-host support: AutoCAD-family products are fully supported hosts
• Pixi-first dependencies: Pixi replaces UV as the primary package resolver (conda-forge + PyPI)
• MCP for AI: standalone MCPServer.exe discovers all running hosts and exposes tools to AI clients
• PyTest multi-host: --host parameter supports revit, autocad, civil3d, plant3d, and any custom host
• Revit 2027 / .NET 10: new build target for the latest Revit
• Unified state: sys.__devtool__ replaces host-specific attributes

Best Starting Points

• New to the tool: Install And First Run
• Running Python: Modern Python Scripting
• Running compiled add-ins: .NET Assembly Execution
• Seeing geometry: Visualization Overview (Revit only)
• Connecting AI tools: AI Tool Integration (MCP)
• Automated testing: PyTest Bridge
• AutoCAD workflows: AutoCAD Features
• Civil 3D workflows: Civil 3D Features