@@ -51,6 +51,8 @@ Git executable and safety
 API changes
 -----------
 
+* Explicit ``from git import Union`` imports remain available for Demisto SDK's
+  validator registration, retaining the historical ``typing.Union`` alias.
 * Editable/source imports expose the release version in ``git.__version__``,
   matching built distributions. Salt's GitPython provider checks can parse the
   version instead of rejecting the unstamped ``"git"`` build placeholder.
 
@@ -88,6 +88,7 @@
     __version__ = (_Path(__file__).resolve().parents[1] / "VERSION").read_text(encoding="utf-8").strip()
 
 from typing import Optional as _Optional
+from typing import Union as Union  # Compatibility for downstream explicit imports.
 
 from git.util import to_hex_sha
 
 
@@ -1,6 +1,7 @@
 """Public GitPython queries used by released downstream projects."""
 
 from pathlib import Path
+from typing import Union
 from importlib.metadata import version
 
 import pytest
@@ -15,6 +16,12 @@ def test_public_version_supports_downstream_provider_checks():
     assert git.__version__ == version("GitPython")
 
 
+def test_legacy_typing_union_import_supports_downstream_registration():
+    from git import Union as GitUnion
+
+    assert GitUnion is Union
+
+
 @pytest.mark.parametrize("object_format", ["sha1", "sha256"])
 @pytest.mark.parametrize("ref_format", ["files", "reftable"])
 def test_repo_accepts_explicit_literal_path_selection(object_format, ref_format, monkeypatch):