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freecad-mcp: Instructions file for GitHub Copilot

.github/copilot-instructions.md

freecad-mcp copilot-instructions.md is an instructions file for GitHub Copilot from sandraschi/freecad-mcp. It costs 202 tokens per session, scanned A, original, MIT.

Instructions for using an MCP connection to control FreeCAD, a computer-aided design program used for 3D models and engineering work. The connection exposes tools for design, building modelling, fluid analysis, structural analysis, and 3D-print preparation.

In plain words
What is it for?
Creating and converting CAD models, working with BIM and building elements, preparing CFD or structural simulations, generating 3D-printer G-code, and finding models on design marketplaces.
Why use it?
It tells the agent to check whether FreeCAD and the slicer are available before starting, reducing failed operations caused by unavailable services.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is sandraschi/freecad-mcp's own configuration. It tells GitHub Copilot how to work on freecad-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything freecad-mcp configures →

not rated 33repo +1 6d ago A scan 202 tokens original MIT
View source ↗ sandraschi/freecad-mcp
Reuse

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.

Copy the file
curl -O https://raw.githubusercontent.com/sandraschi/freecad-mcp/master/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/sandraschi/freecad-mcp

Made for: GitHub Copilot.

Wrote 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.

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README.md
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Your own site
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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<a href="https://agentmods.dev/instructions/sandraschi/freecad-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/sandraschi/freecad-mcp/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 202 This file is loaded in full into every session.
When invoked 202 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00202 $0.00202
Opus 5.5 $0.00081 $0.00081
Sonnet 5.5 $0.00040 $0.00040
Haiku 4.5 $0.00020 $0.00020

Measured 2mo ago against content hash 9e8051de3cd9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

freecad-mcp copilot-instructions.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 2mo 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.

.github/copilot-instructions.md · 19 lines

What it actually says

Session Context (FreeCAD MCP)

You have access to 46+ FreeCAD CAD/CAM/CAE tools via MCP.

Before starting work:

  1. Check FreeCAD availability: freecad_status()
  2. Check slicer status: slicer_status()

Capabilities:

  • Core CAD: STEP/STL conversion, model info, shape creation
  • BIM: walls, slabs, columns, windows, doors, roofs, IFC import/export
  • CFD: OpenFOAM case building, solver, parametric studies, PINN sampling
  • FEM: CalculiX structural analysis, materials, constraints, meshing
  • FluidX3D: GPU CFD setup, compile, run, results
  • Slicing: PrusaSlicer G-code generation
  • Marketplace: Printables/Thingiverse/GrabCAD search and download
  • REST API at 127.0.0.1:10944
  • Webapp at 127.0.0.1:10945
Changes

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.

  1. 2mo ago First seen · 19 lines · 202 tokens per session scan A 9e8051de3cd9

Subscribe to this mod's changes

freecad-mcp copilot-instructions.md is an instructions file published in the GitHub repository sandraschi/freecad-mcp (33 stars, last pushed 6d ago), licensed MIT. It adds 202 tokens to every session, about $0.0008 per session on Opus 5.5. 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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