feat: unify CAD workflows on DesignIR 3.0

text-to-cad/README.md

@@ -6,7 +6,7 @@ STEP-first CAD engine used by CadSet.
 
 1. Generate an editable model from natural language.
 2. Generate or modify an editable model from text plus reference images.
-3. Reconstruct an uploaded STEP into DesignIR 2.0, then modify and rebuild it
+3. Reconstruct an uploaded STEP into DesignIR 3.0 / SurfaceIR, then modify and rebuild it
    without reading the teacher STEP.
 
 `cad-router` chooses one of two execution backends:
@@ -34,6 +34,22 @@ reconstruction runner rejects source STEP imports, embedded B-Rep, full mesh
 substitutes, source face references, and paths into the protected teacher
 workspace. Acceptance runs separately against the rebuilt STEP.
 
+## Uploaded STEP execution
+
+Run the full upload path through `cad-router`:
+
+```bash
+.venv/bin/python skills/cad-router/scripts/route.py \
+  "重建上传的 STEP，并返回可修改参数" \
+  --edit-source /absolute/path/to/part.step \
+  --task-dir /absolute/path/to/task \
+  --execute
+```
+
+The task returns an independently rebuilt STEP, its DesignIR 3.0 source,
+geometry acceptance measurements, parameter perturbation results, and a catalog
+containing only validated editable parameters.
+
 ## Development
 
 Use the repository-local Python environment for checks: