woodwright

A semantic CAD library for woodworking. You describe furniture the way a woodworker thinks about it: boards with named sides, and the joints between them. woodwright works out the joinery, the cut sizes and where every part goes, and produces 3D models (STEP, STL), drawings (SVG) and cut lists.

It is built on build123d. This is an early alpha: the API will still change.

Installation

pip install woodwright  # or: uv add woodwright

Requires Python 3.14. Source: https://github.com/bzamecnik/woodwright

Quickstart

A rail tenoned into a stile. You give the design dimensions and the joint; the tenon, the mortise, the rail's cut length and its placement are derived.

from pathlib import Path

import woodwright as ww
from woodwright.export import export_model

oak = ww.Stock.board(thickness=20, species="oak")

frame = ww.Assembly("corner", root_location=ww.orient(right_end=ww.UP, back_edge=ww.RIGHT))
stile = frame.add(ww.Board("stile", oak, length=600, width=60))
rail = frame.add(ww.Board("rail", oak, length=300, width=60))  # shoulder to shoulder
frame.join(ww.MortiseTenon(tenon=rail.left_end, mortise=stile.back_edge))

model = frame.resolve()
print(model.cut_list())
export_model(model, Path("output/corner"))  # STEP, STL, SVG views, cut list

stile  600 x 60 x 20 mm  oak
       - mortise 50 x 8 mm, 42 deep, in stile.back_edge
rail   340 x 60 x 20 mm  oak
       - tenon 50 x 8 mm, 40 long, on rail.left_end

What's there so far:

• Cuts: grooves, dados and rabbets (through or stopped), mortises, slot mortises, tenons (haunched, mitred, chamfered, multiple side by side or across the thickness, wedged), tongues, dovetail tongues and laps, chamfers, mitres (across the face, the edge, or along the grain), tapers.
• Joints: butt (also turned at an angle); dado, rabbet, groove and tongue and groove housings (also stopped); mortise and tenon (blind, through, stub, haunched, mitred, with mitred shoulders, multiple, wedged, tusk); loose tenons and loose tongues; bridles (L and T); half laps (plain, dovetailed, mitred), cross laps, mitred face tenons; box joints; sliding, through, half-blind, mitred-corner and blind mitred dovetails; mitre corners and splices; table-top buttons.

Example library

woodwright.examples holds over ninety examples, from single cuts through joints to projects: a try square, a mallet, a bookshelf, a dovetailed drawer with a bottom, a dining table, a side table, a chair, a step stool seat, ledged and frame-and-panel doors.

python -m woodwright.examples list
python -m woodwright.examples export projects.chair --out output

The design ideas are in docs/vision.md and docs/plan.md.

Development

Install the environment and dependencies:

uv sync
pre-commit install  # ruff lint + format on commit

Optionally, for notebooks with an interactive 3D viewer:

uv sync --group notebook
uv run jupyter lab

Run the tests and the linters:

uv run pytest
uv run ruff format
uv run ruff check --fix

License

MIT License.

Credits

• Ideas and guidance: Bohumír Zámečník
• Most of the implementation: Claude Code (Opus 5.5)