strands-cad 0.3.3

🔧 Atomic CAD, mesh, SDF, cadquery, neural & print tools for Strands agents — prompt-to-print pipeline

🔧 strands-cad

Atomic CAD, mesh, SDF, cadquery, neural & print tools for Strands agents.

Four independent paths to a printable 3D asset:

Path	Tool	Best For
Parametric SCAD	scad_render_stl	Mechanical, brackets, parametric families
B-rep CAD (NURBS)	cq_render_stl / cq_render_step	Fillets, chamfers, engineering-grade parts
SDF / implicit math	sdf_render_stl	Organic, twisted, TPMS, blended surfaces
Neural (text/image → 3D)	neural_text_to_stl	AI generation from prompt or reference photo

All roads lead to STL → 3MF → Bambu Lab.

Install

pip install strands-cad

Core includes: trimesh, cadquery, torch, scipy, scikit-image, mujoco, paho-mqtt, fast-simplification, meshio, numpy.

Optional git-only extras

PyPI disallows direct git URLs, so two libraries install separately:

python -m strands_cad.install_extras            # both
# OR selective:
python -m strands_cad.install_extras sdf        # fogleman/sdf → sdf_render_stl
python -m strands_cad.install_extras neural     # openai/shap-e → neural_text_to_stl

External system tools

• openscad for scad_* tools — brew install openscad
• bambu-studio for slice_bambu — download from bambulab.com

The 55 Atomic Tools

Layer	Tools
SCAD (parametric)	scad_probe, scad_render_stl, scad_render_png, scad_validate, scad_view, scad_turntable
G-code	gcode_check, gcode_preview_png
CadQuery (B-rep, NURBS)	cq_render_stl, cq_render_step, cq_import_step, cq_render_svg
SDF (implicit math)	sdf_render_stl, sdf_list_primitives, sdf_gyroid_infill, sdf_from_function, sdf_lattice_infill_stl
Neural (AI generation)	neural_text_to_stl, neural_image_to_stl
Point Cloud	pointcloud_from_stl, pointcloud_to_stl, pointcloud_downsample
STL / Mesh	stl_parse, stl_volume, stl_bbox, stl_weight, stl_repair, stl_transform, stl_convert, mesh_decimate, mesh_normalize, mesh_boolean, mesh_combine, mesh_hollow
3MF	mf3_pack, mf3_unpack, mf3_read_metadata
Slice	slice_bambu, slice_profile_get, slice_estimate
Bambu Printer	bambu_connect, bambu_send, bambu_status, bambu_control, bambu_camera, bambu_ams
Sim	sim_build_mjcf, sim_run_headless, sim_view_live, sim_inertia_from_stl
Preview	preview_serve, preview_stop
Meta	bom_parse, bom_total, journal_append

MCP Server (Claude Code, Claude Desktop, Cursor, Kiro)

All 55 tools are exposable over the Model Context Protocol via the strands-cad-mcp entrypoint (built on strands-mcp-server).

Claude Code

claude mcp add strands-cad -- strands-cad-mcp
# or skip heavy groups for faster startup:
claude mcp add strands-cad -- strands-cad-mcp --skip neural,sim

Claude Desktop

{
  "mcpServers": {
    "strands-cad": {
      "command": "strands-cad-mcp",
      "args": ["--skip", "neural"]
    }
  }
}

HTTP mode (multi-client / remote)

strands-cad-mcp --http --port 8000            # → http://localhost:8000/mcp
strands-cad-mcp --http --port 8000 --stateless  # multi-node scalable

Options

Flag	Effect
(default)	stdio transport, all available tool groups
--http --port N	StreamableHTTP transport instead of stdio
--stateless	Fresh transport per request (horizontal scaling)
--tools a,b,c	Expose only named tools
--skip neural,sim,...	Skip tool groups (scad,stl,mf3,slice,bambu,sim,preview,meta,sdf,cadquery,neural)
--agent-invocation	Also expose invoke_agent for full conversations
--debug	Verbose logging (stderr)

Missing optional deps (torch, mujoco, cadquery, sdf) auto-disable their group — the server always boots with whatever is installed.

Quick Examples

Parametric CAD (CadQuery)

from strands_cad import cq_render_stl

cq_render_stl(script='''
result = (
    cq.Workplane("XY").box(60, 40, 5)
    .edges().fillet(2)
    .faces(">Z").hole(20)
)
''', output_stl="bracket.stl")

Implicit Math (SDF)

from strands_cad import sdf_render_stl

sdf_render_stl(
    expression="torus(30, 8).twist(radians(180)/60)",
    output_stl="twisted_torus.stl",
    resolution=0.4,
)

AI Text → 3D (Shap-E)

from strands_cad import neural_text_to_stl

neural_text_to_stl(
    prompt="a stylized rocket ship",
    output_stl="rocket.stl",
    steps=64,
)

Full agent

from strands import Agent
from strands_cad import ALL_TOOLS

agent = Agent(tools=ALL_TOOLS)
agent("Generate a mechanical bracket with M4 mounting holes, "
      "verify weight in PLA, and pack it for my Bambu P1S.")

Design Principles

• Atomic — one tool = one verb = one input shape = one output shape
• No orchestration inside tools; the agent composes
• No hidden state except the Bambu MQTT connection handle
• Standard response: {status, content: [{text}], ...extras}

License

MIT