chore: import upstream snapshot with attribution

tests/cli/test_provider_cli.py

@@ -0,0 +1,35 @@
+from pathlib import Path
+import unittest
+
+ROOT = Path(__file__).resolve().parents[2]
+PROVIDER_CMD = (ROOT / "deeptutor_cli" / "provider_cmd.py").read_text(encoding="utf-8")
+CLI_README = (ROOT / "deeptutor_cli" / "README.md").read_text(encoding="utf-8")
+ROOT_README = (ROOT / "README.md").read_text(encoding="utf-8")
+
+
+class ProviderCliDocsContractTest(unittest.TestCase):
+    def test_provider_contract_describes_copilot_as_validation_not_oauth_login(self) -> None:
+        self.assertIn(
+            'help="Provider: openai-codex (OAuth login) | github-copilot (validate existing Copilot auth)"',
+            PROVIDER_CMD,
+        )
+        self.assertIn('"""Authenticate or validate provider access."""', PROVIDER_CMD)
+        self.assertIn("GitHub Copilot auth validation succeeded.", PROVIDER_CMD)
+        self.assertIn("GitHub Copilot auth validation failed:", PROVIDER_CMD)
+        self.assertNotIn("OAuth provider: openai-codex | github-copilot", PROVIDER_CMD)
+        self.assertNotIn("GitHub Copilot OAuth authentication succeeded.", PROVIDER_CMD)
+
+    def test_readmes_match_the_cli_contract(self) -> None:
+        self.assertIn(
+            "Provider auth (`openai-codex` OAuth login; `github-copilot` validates an existing Copilot auth session)",
+            ROOT_README,
+        )
+        self.assertIn(
+            "deeptutor provider login github-copilot    # 校验现有 GitHub Copilot 认证是否可用",
+            CLI_README,
+        )
+        self.assertNotIn("OAuth login (`openai-codex`, `github-copilot`)", ROOT_README)
+
+
+if __name__ == "__main__":
+    unittest.main()