GOLEM-3DMCP-Rhino-

pip install golem-3dmcp

# 1. Install
pip install golem-3dmcp

# 2. Deploy the Rhino plugin (one-time)
golem install-rhino

# 3. Verify everything works
golem doctor

{
  "mcpServers": {
    "golem-3dmcp": {
      "command": "uvx",
      "args": ["golem-3dmcp"]
    }
  }
}

# 1. Registrations in the shipped package
grep -c '@mcp.tool' src/golem_3dmcp/tools/*.py | awk -F: '{s+=$2} END {print s}'   # 89

# 2. What the running server advertises over MCP
python -c "import asyncio, importlib, golem_3dmcp.server as s; \
[importlib.import_module('golem_3dmcp.tools.' + m) for m in \
 ('scene','creation','operations','surfaces','manipulation','viewport','files','grasshopper','scripting')]; \
print(len(asyncio.run(s.mcp.list_tools())))"                                       # 89

 AI Agent (Claude Code / Cursor / Windsurf)
      |
      |  MCP (stdio, JSON-RPC)
      v
+---------------------------+
|     GOLEM MCP Server      |
|     Python 3.10+          |
|     FastMCP + 9 tool      |
|     modules               |
+---------------------------+
      |
      |  TCP 127.0.0.1:9876
      |  Length-prefixed JSON
      v
+---------------------------+
|     Rhino Plugin          |
|     Python 3.9 (embedded) |
|     TCP Server            |
|     9 handler modules     |
+---------------------------+
      |
      |  RhinoCommon + rhinoscriptsyntax
      v
+---------------------------+       +-------------------------+
|     Rhinoceros 3D         | <---> |   Grasshopper           |
|     Document, Geometry,   |       |   Sub-server :9877      |
|     Layers, Views         |       |   Definitions, Params   |
+---------------------------+       +-------------------------+

Create a 100 x 50 x 30 box on a layer called 'Structure',
then boolean-union it with a sphere of radius 20 centred at [50, 25, 30].

List all objects on the 'Walls' layer and tell me their volumes.

Open parametric_facade.gh, set the 'PanelCount' slider to 24,
recompute, and bake the result to a 'Facade' layer.

Set perspective view to shaded mode, zoom to extents, and capture a screenshot.

import Rhino.Geometry as rg
pts = [rg.Point3d(i*10, 0, i**2) for i in range(20)]
crv = rg.Curve.CreateInterpolatedCurve(pts, 3)
sc.doc.Objects.AddCurve(crv)
__result__ = {"point_count": len(pts), "length": crv.GetLength()}

GOLEM-3DMCP: Starting server on 127.0.0.1:9876...
GOLEM-3DMCP: Server started successfully!
GOLEM-3DMCP: 135 handler methods registered.

# Unit tests (no Rhino needed)
pytest tests/ -v --ignore=tests/test_integration.py

# Full suite (integration tests auto-skip if Rhino not running)
pytest tests/ -v

# Integration tests only (requires Rhino + plugin running)
pytest tests/test_integration.py -v -m integration

main                          ← development
  └── main  ← PyPI releases (pip install golem-3dmcp)

golem-3dmcp/
├── src/golem_3dmcp/           # MCP Server (pip install golem-3dmcp)
│   ├── cli.py                 #   CLI entry point (golem command)
│   ├── server.py              #   FastMCP server
│   ├── connection.py          #   TCP client (singleton, thread-safe)
│   ├── protocol.py            #   Wire format: 4-byte length prefix + JSON
│   ├── config.py              #   Environment variable configuration
│   ├── models/                #   Pydantic data models
│   ├── tools/                 #   9 MCP tool modules
│   └── _rhino_plugin/         #   Bundled Rhino plugin (deployed via CLI)
├── tests/                     # 245 tests (pytest --collect-only)
├── docs/                      # Architecture, protocol spec, tool reference
└── pyproject.toml             # Package definition

# Clone the repository
git clone https://github.com/TheKingHippopotamus/GOLEM-3DMCP-Rhino-.git
cd GOLEM-3DMCP-Rhino-

# Create virtual environment (Python 3.10+ required)
python -m venv .venv
source .venv/bin/activate  # or .venv\Scripts\activate on Windows
pip install -e ".[dev]"

# Install pre-commit hooks
pre-commit install

# Lint
ruff check src/ tests/

# Type check (strict mode)
mypy src/golem_3dmcp/ --ignore-missing-imports

# Unit tests (no Rhino needed)
pytest tests/ -v --ignore=tests/test_integration.py

# Integration tests (requires Rhino 8 + plugin running)
pytest tests/test_integration.py -v -m integration