feat: add per-part CAD model specs

2026-07-23 15:12:28 +08:00
parent 304911a69f
commit a2f3ba6a90
35 changed files with 1351 additions and 85 deletions
@@ -72,6 +72,14 @@ Write `cad-task.json` beside the task artifacts with this minimum shape:
 ```

 Paths are relative to the task directory unless an external input must remain absolute.
+Do not store authoritative model parameters in `cad-task.json`. Every part must
+have a sibling `model-spec.json` that owns its parameter values, reconstruction
+mode, parametric modification layer, and output paths. See `model-spec.md`.
+
+For an imported STEP, use `exact_step_base`: copy the explicitly supplied file
+into the task directory, record its checksum and geometry signature, and keep
+the imported B-Rep unchanged when the modification list is empty. This is an
+exact geometric base contract, not recovery of the original CAD feature tree.

 ## Backend adapter requirements