feat: Revert code that enforces uuid structure on context id in tasks

src/a2a/utils/task.py

@@ -1,3 +1,3 @@
 """Utility functions for creating A2A Task objects."""
 
 import uuid
@@ -28,22 +28,10 @@
         if isinstance(part.root, TextPart) and not part.root.text:
             raise ValueError('TextPart content cannot be empty')
 
-    context_id_str = request.context_id
-    if context_id_str is not None:
-        try:
-            uuid.UUID(context_id_str)
-            context_id = context_id_str
-        except (ValueError, AttributeError, TypeError) as e:
-            raise ValueError(
-                f"Invalid context_id: '{context_id_str}' is not a valid UUID."
-            ) from e
-    else:
-        context_id = str(uuid.uuid4())
-
     return Task(
         status=TaskStatus(state=TaskState.submitted),
         id=(request.task_id if request.task_id else str(uuid.uuid4())),
-        context_id=context_id,
+        context_id=(request.context_id if request.context_id else str(uuid.uuid4())),
         history=[request],
     )
 

tests/utils/test_task.py

@@ -188,24 +188,6 @@ def test_completed_task_invalid_artifact_type(self):
                 history=[],
             )
 
-    def test_new_task_with_invalid_context_id(self):
-        """Test that new_task raises a ValueError for various invalid context_id formats."""
-        invalid_ids = ['not-a-uuid', '']
-        for invalid_id in invalid_ids:
-            with self.subTest(invalid_id=invalid_id):
-                with pytest.raises(
-                    ValueError,
-                    match=f"Invalid context_id: '{invalid_id}' is not a valid UUID.",
-                ):
-                    new_task(
-                        Message(
-                            role=Role.user,
-                            parts=[Part(root=TextPart(text='test message'))],
-                            message_id=str(uuid.uuid4()),
-                            context_id=invalid_id,
-                        )
-                    )
-
 
 if __name__ == '__main__':
     unittest.main()