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cdsl-cad/backend/engine/cdsl_engine/README.md
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2026-08-21 11:13:18 +08:00

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# Local CDSL Engine
This package rebuilds `cad.cdsl.llm.v1` models through the CDSL-only path:
`sketch_solver -> llm_compiler -> llm_engine -> STEP`
Supported profiles are defined by `SHAPE_GENERATORS` in `sketch_solver.py`.
Supported feature atomic operations are defined by the dispatch in `llm_engine.py`
and their required parameters are defined by `REQUIRED` in `llm_compiler.py`.
Their human-readable contract is in `profile_schema.json`; the complete,
machine-enforced CDSL object contract is in `cdsl_schema.json`.
The Studio only accepts self-contained profile data and requires successful
`engine=cdsl_only` output. It never uses the legacy translator fallback or
`compiler_context`.
## Engine schema maintenance
`profile_schema.json` and `cdsl_schema.json` together are the source of truth
for the engine contract exposed to the CAD Agent and the backend validator.
Any addition, removal, rename, or
parameter-contract change in `sketch_solver.py`, `llm_compiler.py`, or
`llm_engine.py` must update both files in the same change.
`backend/tests/test_profile_schema.py` fails when the registered profiles or
supported atomic operations diverge from the document.