chore: import upstream snapshot with attribution

tests/test_version_imports.py

@@ -0,0 +1,40 @@
+"""Regression guard: version symbols must remain importable from specify_cli."""
+from specify_cli import (
+    GITHUB_API_LATEST,
+    self_check,
+    self_upgrade,
+)
+
+
+def test_version_symbols_importable():
+    assert isinstance(GITHUB_API_LATEST, str)
+    assert GITHUB_API_LATEST.startswith("https://")
+    assert callable(self_check)
+    assert callable(self_upgrade)
+
+
+def test_version_symbols_available_from_star_import():
+    namespace = {}
+    exec("from specify_cli import *", namespace)
+
+    for symbol in ("GITHUB_API_LATEST", "self_check", "self_upgrade"):
+        assert symbol in namespace
+
+
+def test_version_module_symbols_directly_importable():
+    from specify_cli._version import (
+        _fetch_latest_release_tag,
+        _get_installed_version,
+        _is_newer,
+        _normalize_tag,
+        self_app,
+        self_check,
+        self_upgrade,
+    )
+    assert callable(_get_installed_version)
+    assert callable(_normalize_tag)
+    assert callable(_is_newer)
+    assert callable(_fetch_latest_release_tag)
+    assert callable(self_check)
+    assert callable(self_upgrade)
+    assert self_app is not None