FreeGAD
FreeCAD workbench where an AI agent reads the model and applies confirmed edits as single undo transactions.
What it does and how it connects
FreeGAD is an AI-powered assistant for FreeCAD 1.0 and 1.1 on Windows, by Dmitriy Dobrovolskiy. A persistent in-CAD agent works from a docked chat panel: it reads the live document, measures, asks questions, runs engineering calculations, and, with confirmation, modifies the model.
It is backed by the Claude API, with claude-opus-5 as the default, or any OpenAI-compatible API, with a tool-use loop over the live FreeCAD document. Writes show a confirmation dialog with the exact code or change, and edits apply as a single undo transaction. A watchdog aborts scripts after 120 seconds, and a memory guard aborts scripts that grow FreeCAD's memory by more than half the RAM.
The README states the tool is free under AGPL-3.0, with a Windows installer download, and that prompt caching serves 99.99 percent of input tokens from cache in the author's own data. Each turn shows a cost line with API calls, token counts, and an estimated dollar figure, plus a running session total.
Alternatives
Compare side by side- freecad-ai
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- Fusion MCPilot
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Recurring errors it addresses
Error Index entries this tool is built to reduce or work around.
- When an agent fans out parallel create calls through the FreeCAD MCP bridge, the shared connection races: the first object is created even though its call reports failure, and the second object is silently never created with the status still showing healthy.Error Index
- A FreeCAD MCP bridge silently ignored parameters the client materialized from JSON-Schema defaults, so box(size=20) produced a default 10mm shape. The agent believes it built the requested geometry while the model is something else entirely.Error Index
- A FreeCAD MCP bridge's autosave-before-call rewrote the active document on every tool call even with zero unsaved changes, stamping phantom diffs onto git-tracked CAD files. Agent activity pollutes version control with edits no human authored.Error Index
- A CAD agent bridge's screenshot tool refused any image over a 50KB socket frame, so every real model screenshot was dropped, and images that did fit arrived as base64 text inside JSON instead of real image blocks. The agent's only visual feedback channel was dead for production-scale models.Error Index
- A FreeCAD user reports fillet/bevel as big weaknesses of FreeCAD and shows a fillet that breaks in FreeCAD and in the FreeCAD-Nxt add-on meant to fix it.Error Index
Sources
Not verified
- No independent user voice found: the repository has no public issues.
- A named individual builder beyond Dmitriy Dobrovolskiy as named in the README
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.