v2.2.1

2.2.1 Update Notes

The first stable release of the 2.2 line. It brings the code-first editor, the
notebook runtime of 2.2.0b1 and the agent landing path to a stable version.

Editor: sca edit

• A web editor over a directory of notebooks, part of the SDK
  (pip install "simplecadapi[editor]"). It runs the notebooks in a marimo
  kernel with the SDK's own cell executor, previews the live model straight
  from the solids, and shares one per-cell cache with sca run.
• Parameters from # ---- params ---- cells (an optional # ui: comment picks
  the control); local modules (shared dimensions) have their own view.
• Picking a solid, face, edge or vertex writes a scad.ql selection cell
  (selected_<kind>, selected_item) into the notebook; edits autosave; a cell
  reference can be copied for a coding agent; sca snapshot shows an agent what
  the person sees. A log dock reports what ran and what failed.
• Light and dark themes (follows the system, with a manual switch).
• Re-Studio is removed: the reverse-engineering studio (Re-mode of the
  standalone sca-web-editor) is gone; sca edit replaces the standalone editor.

Landing path for agents

docs/landing.md is the script an agent follows to install the SDK and its
skill and to open an example in the editor. sca example u_link copies the
bundled workspace; sca skill where shows where the skill is installed. The
wheel now carries the built editor UI, the skill sources and the example.

Modeling

scale, affine transform, signed offset, draft, tapered and
until-limited extrusion and multisection sweep are recorded features. Volumes
and centres of mass integrate NURBS by knot spans, which is exact for rational
patches. A build123d to FTC converter is included under
tools/research/build123dftc (research tooling).

See the changelog for the complete list.