cadgen
STEP-first CAD artifact generation runtime for CAD agent skills, built on build123d and OCCT.
The package boundary is intentionally narrow: it owns artifact generation,
validation, selector/topology extraction, mesh settings, source hashing, and the
cadgen-step-artifact CLI. It also includes small generated-script helpers such
as cadgen.assembly.AssemblyHelper, which wraps native build123d labels, joints,
and compounds without owning skill-specific UX. Prompts, viewer UI, and snapshot
job orchestration stay in their owning skills.
cadgen is developed in
earthtojake/text-to-cad and was
previously named cadpy inside that repository.
Public API
The supported import surface is the root cadgen exports plus the top-level
cadgen.* modules:
- Generator-script helpers: root exports (
AssemblyHelper,MateRelation,MateTarget,label_text,label_shape,target,ensure_step_glb_artifact,validate_step_glb_artifact),cadgen.assembly, andcadgen.step_scene(import_step,load_step_scene,located_shape,occurrence_selector_id,scene_occurrence_shape). - Generator-script helpers (2D):
cadgen.sources(load_source_module) andcadgen.flatten(planar-face projection/unfold, contour emission, kerf offsetting) for.dxf.pydrawing generators. - Skill CLI surface:
cadgen.generation(generate_step_targets,generate_dxf_targets,targets_include_output_pairs),cadgen.catalog,cadgen.metadata,cadgen.analysis,cadgen.lookup,cadgen.cad_ref_syntax,cadgen.selector_types,cadgen.reporting,cadgen.cli_logging,cadgen.render,cadgen.step_artifacts,cadgen.step_targets,cadgen.step_export,cadgen.drawing_checks(DXF drawing validation), andcadgen.drawing_render(DXF render payload + SVG snapshots). - Process entry points:
cadgen-step-artifact,python -m cadgen.step_artifact_cli,python -m cadgen.step_export_target, andpython -m cadgen.dxf_artifact.
Everything under cadgen._internal is private implementation (the STEP scene,
generation, GLB/topology, and export engines live there) with no import
stability between releases; cadgen.generation and cadgen.step_scene are
thin facades over those engines that re-export only the supported names.
Install
Released versions are published to PyPI by the repository's Release workflow;
the package version always matches the CAD plugin release version:
python -m pip install cadgen
Production skill bundles pin the exact release version in their
requirements.txt (for example cadgen==0.4.0) and keep a vendored copy of
this package as an offline fallback:
python -m pip install ./scripts/packages/cadgen
Local Development
Install it editable into the repo CAD runtime when working on the source package directly:
./.venv/bin/python -m pip install -e packages/cadgen
After that, changes under packages/cadgen/src/cadgen are immediately visible to
local source checkouts that import the package directly.
On develop, the CAD skill and root Viewer point at this package through the
development symlinks skills/cad/scripts/packages/cadgen and
viewer/packages/cadgen. Keep those links intact with
scripts/dev/setup-symlinks.sh --check.
Production Bundling
Build a wheel and install it into each skill's bundled Python environment during packaging:
./.venv/bin/python -m build packages/cadgen
python -m pip install packages/cadgen/dist/cadgen-*.whl
The CAD and cad-viewer skills should depend on the package artifact they bundle,
not on skills/cad or the repository root. Production packaging vendors
installable packages under skills/cad/scripts/packages/cadgen and
skills/cad-viewer/scripts/viewer/packages/cadgen; production packaging can also
set VIEWER_CAD_PYTHON to a skill-local Python runtime with this package
installed. Production skill bundles install cadgen==<release version> from
PyPI first and fall back to the vendored copy when offline.
1 maintainer
Metadata
1 maintainer
Release files for cadgen 0.4.27
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| cadgen-0.4.27.tar.gz | 287.2 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| cadgen-0.4.27-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 614.7 kB
Release files / cadgen-0.4.27.tar.gz
| Download URL | cadgen-0.4.27.tar.gz |
|---|---|
| Size | 287.2 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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Transparency logRelease files / cadgen-0.4.27-py3-none-any.whl
| Download URL | cadgen-0.4.27-py3-none-any.whl |
|---|---|
| Size | 327.5 kB |
| Tags | Python 3 |
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SHA-256 checksum How to use checksums |
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| Uploaded via |
twine/7.0.0 CPython/3.13.14
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