refactor: simplify distillation data layout

text-to-cad/tests/python/skills/cad-router/test_route.py

@@ -363,12 +363,10 @@ class CadRouterTests(unittest.TestCase):
         teacher_source = (
             Path(__file__).resolve().parents[5]
             / "designir-pipeline"
-            / "workspace"
-            / "teacher"
-            / "inbox"
+            / "input"
             / "part.step"
         )
-        with self.assertRaisesRegex(ValueError, "cannot read the teacher"):
+        with self.assertRaisesRegex(ValueError, "cannot read distillation input"):
             route_module.route(
                 self.parse(
                     "修改这个零件",
@@ -377,6 +375,23 @@ class CadRouterTests(unittest.TestCase):
                 )
             )
 
+    def test_private_run_artifact_is_rejected_as_edit_source(self) -> None:
+        run_source = (
+            Path(__file__).resolve().parents[5]
+            / "designir-pipeline"
+            / "runs"
+            / "designir"
+            / "part.designir.json"
+        )
+        with self.assertRaisesRegex(ValueError, "cannot read distillation input"):
+            route_module.route(
+                self.parse(
+                    "修改这个零件",
+                    "--edit-source",
+                    str(run_source),
+                )
+            )
+
 
 if __name__ == "__main__":
     unittest.main()