Borrowing it
Nothing to install: this file belongs to sandraschi/freecad-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/sandraschi/freecad-mcp/master/AGENTS.mdgit clone --depth 1 https://github.com/sandraschi/freecad-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/sandraschi/freecad-mcp/agents-md)<a href="https://agentmods.dev/instructions/sandraschi/freecad-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sandraschi/freecad-mcp/agents-md.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00946 | $0.00946 |
| Opus 5 | $0.00473 | $0.00473 |
| Sonnet 5 | $0.00189 | $0.00189 |
| Haiku 4.5 | $0.00095 | $0.00095 |
Grade A, and why
freecad-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 37 lines — stays where its author put it; the contents beside it link to each section on GitHub.
freecad-mcp — Agent Guide
Overview
FreeCAD MCP server — Parametric 3D CAD modeling, 2D TechDraw drafting, 2D constraint sketching, multi-part STEP assemblies, generative topology optimization, CFD (OpenFOAM CPU + FluidX3D GPU), and CalculiX FEM structural stress analysis via 50+ MCP tools and REST API.
Core Capabilities for Fleet Agents
| Capability | Core MCP Tools | Output Formats | Fleet Handoff Targets |
|---|---|---|---|
| Parametric CAD & Extrusion | freecad_model (sketch), create_shape |
STEP, STL, FCStd | qcad-mcp, prusa-slicer-mcp |
| 2D Engineering Blueprints | freecad_model (techdraw) |
SVG, PDF | mcp-central-docs |
| Multi-Part STEP Assemblies | freecad_model (assembly, inspect_assembly) |
STEP, STL, Tree JSON | robotics-mcp (URDF) |
| Generative Weight Reduction | freecad_model (generative) |
STEP, Volume JSON | robotics-mcp, prusa-slicer-mcp |
| Heuristic Edge Filleting | freecad_model (heuristic_fillet) |
STEP | Manufacturing pipelines |
| Architectural BIM / IFC | bim_create_wall, bim_export_ifc |
IFC, FCStd | Architecture workflows |
| OpenFOAM CFD (CPU) | cfd_create_domain, cfd_snappy_mesh, cfd_configure_physics, cfd_post_process |
OpenFOAM case, Cd/Cl JSON | openfoam-mcp |
| Fluid-Structure Interaction (FSI) | cfd_map_loads_to_fem |
CalculiX INP, Stress MPa | freecad-mcp (FEM) |
| FluidX3D GPU LBM CFD | cfd_fluidx3d_setup, cfd_fluidx3d_export_for_render |
VTK, OBJ Streamlines, WebM | godot-mcp, resonite-mcp (VR) |
| CalculiX Structural FEM | fem_create_analysis, run_fem_analysis |
Von Mises Stress MPa, INP | Engineering validation |
Standards & Patterns
- FastMCP 3.4+ Portmanteau Pattern: Portmanteau tool
freecad_modelmapsexecution_mode("hands_off" or "hands_in") to underlying operational modules insrc/freecad_mcp/model_ops.py. - Annotation Constants: Every
@mcp.tool()explicitly includesannotations=READ_ONLYorannotations=MUTATING. - Dual Execution Architecture: Prefers live FreeCAD TCP bridge (port 10946) for full B-Rep tree access; automatically falls back to headless
FreeCADCmdsubprocess if GUI is not connected. - REST Control Endpoint:
POST http://localhost:10944/api/v1/control/toolwith payload{"tool": "...", "arguments": {...}}.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago Changed · +19 lines · +751 tokens per session b33e552dcf13
- 8d ago First seen · 18 lines · 195 tokens per session scan A f3e578326b25
freecad-mcp AGENTS.md is an instructions file published in the GitHub repository sandraschi/freecad-mcp (24 stars, last pushed yesterday), licensed MIT. It adds 946 tokens to every session, about $0.0047 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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