ganjihong 871070c440 refactor(cdsl_engine): extract session/extents/pattern_transform from runtime
Phase 2 of the decoupling refactor (behavior-preserving move):
- runtime_base.py: RuntimeExecutionError, FeatureExecutionError, ExtentVector
- session.py: GeometryAdapter protocol + ExecutionSession
- extents.py: end-condition planning (_extent_vectors family)
- pattern_transform.py: translate/mirror/rotate replay parameter algebra
- runtime.py: keeps executors + registry + entry points; re-exports all
  moved names (incl. test-referenced privates) for import stability

No behavior change; verified against baseline (zero new failures).
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CAD CDSL Workspace

This repository is organized as a CAD generation workspace with four runtime programs and one AI skill:

  • frontend/: Agent UI and 3D model preview.
  • backend/: API, generation orchestration, engine, and official CDSL library.
  • solidworks_to_json/: SolidWorks export plugin.
  • json_to_cdsl/: SolidWorks JSON to parameterized CDSL converter.
  • backend/agent/skills/cad-engine/: Instructions for the backend AI agent to use the CAD engine.
  • cdsl 5/: Existing experimental assets kept unchanged for reference.

Run both application services from the repository root with:

./run.sh

On Windows, run run.bat instead.

Python 3 and Node.js (including npm) must be installed first. Both startup scripts create backend/.venv and install the backend and frontend dependencies automatically when they are missing.

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