diff --git a/src/modelscope_hub/_openapi.py b/src/modelscope_hub/_openapi.py
index 0306560..b49e248 100644
--- a/src/modelscope_hub/_openapi.py
+++ b/src/modelscope_hub/_openapi.py
@@ -388,6 +388,28 @@ def get_current_user(self) -> JSON:
         """``GET /users/me`` — fetch the authenticated user profile."""
         return self._request("GET", "/users/me")
 
+    def get_current_username(self) -> str:
+        """The authenticated account handle, or ``""`` when unresolvable.
+
+        Callers need the handle to build repo paths (``<owner>/<repo>``), and
+        the field it arrives in has changed: the endpoint now answers with
+        OIDC-style claims (``preferred_username`` / ``name``) where it used to
+        return ModelScope's own ``Username``. Reading only the old key yielded
+        an empty owner, which then produced confusing downstream failures
+        (``path is required`` on create, then a ``//`` URL 404 on commit).
+
+        Keys are tried in handle-before-display-name order so a server that
+        populates both still gives the login handle rather than a full name.
+        """
+        data = self.get_current_user()
+        if not isinstance(data, dict):
+            return ""
+        for key in ("Username", "username", "preferred_username", "name"):
+            value = data.get(key)
+            if value:
+                return str(value)
+        return ""
+
     # ==================================================================
     # Models
     # ==================================================================
diff --git a/tests/cli/test_openapi.py b/tests/cli/test_openapi.py
index 1625da0..e81e265 100644
--- a/tests/cli/test_openapi.py
+++ b/tests/cli/test_openapi.py
@@ -379,3 +379,45 @@ def test_foreign_host_absolute_url_strips_auth_and_cookies(self, client):
         assert call_kwargs["cookies"] == {}
         # Caller-supplied headers (not credentials) must still be sent.
         assert call_kwargs["headers"]["Content-Type"] == "application/octet-stream"
+
+
+class TestCurrentUsernameFieldCompat:
+    """``/users/me`` moved from ``Username`` to OIDC claims; both must work.
+
+    Reading only the old key silently produced an empty owner, which surfaced
+    much later as ``path is required`` on repo creation and a ``//`` URL 404 on
+    commit -- so each accepted shape is pinned here.
+    """
+
+    @pytest.mark.parametrize(
+        ("payload", "expected"),
+        [
+            # Shape observed on the server today: OIDC claims, handle in ``name``
+            # while ``preferred_username`` comes back empty.
+            (
+                {
+                    "name": "tastelikefeet",
+                    "preferred_username": "",
+                    "description": "",
+                    "avatar": "",
+                    "email": "user@example.com",
+                },
+                "tastelikefeet",
+            ),
+            # Legacy ModelScope shapes still deployed elsewhere.
+            ({"Username": "alice", "Email": "a@b.c"}, "alice"),
+            ({"username": "bob"}, "bob"),
+            # A server populating both must yield the login handle, not the
+            # human-readable display name.
+            ({"preferred_username": "carol", "name": "Carol Smith"}, "carol"),
+            ({"Username": "dave", "name": "Dave X"}, "dave"),
+            # Unresolvable responses degrade to "" so callers can report it.
+            ({}, ""),
+            ({"name": ""}, ""),
+            (None, ""),
+            ("not-a-dict", ""),
+        ],
+    )
+    def test_username_resolved_from_any_known_field(self, client, payload, expected):
+        with patch.object(OpenAPIClient, "get_current_user", return_value=payload):
+            assert client.get_current_username() == expected