Lobole

Lobole: Open-source parametric 3D CAD software offers B-Rep modeling, assemblies, drawings, FEM, CAM, and Python scripting.

Loböle is an open-source parametric 3D CAD application built on OpenCASCADE and a Vulkan viewport. It provides parametric modeling with a constraint sketcher, assemblies with motion studies and BOMs, 2D drawings out to SVG and PDF, static and modal FEM simulation, and 2.5D to 4-axis CAM milling. It supports Python scripting, JSON-RPC, and an MCP server for AI agents to drive every command. Supported input formats include STEP, STL, and BREP, with exports to glTF, OBJ, PLY, DXF, SVG, and PDF. The software is designed for engineers and makers who need scriptable, agent-driven CAD capabilities.

Lobole at a glance

Best for: Software engineer, Designer
Runs on: Linux, Windows, API, CLI, self-hosted, open source
Pricing: Free and open source under AGPL v3
Released: October 2026
Category: AI coding tool
Website: github.com/eliasaronson/lobole

Key features

Parametric modeling with constraint sketcher and stable topological naming
Assemblies with mates, sub-assemblies, motion studies, and BOMs
2D drawings with projected views and dimensions
Static and modal FEM simulation and topology optimization
CAM milling for 2.5D, 3-axis, and 4-axis setups
Git-backed version control with history and branches
Python SDK, JSON-RPC, and MCP server for agent integration

Use it for

Design mechanical parts and assemblies
Generate 2D manufacturing drawings
Run finite element method simulations
Produce G-code for CNC milling
Automate modeling tasks with Python and AI agents

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