fix: skip stdio subprocess test on Windows CI (#3966)

Co-authored-by: Marvin Context Protocol <41898282+Marvin Context Protocol@users.noreply.github.com>
Co-authored-by: Jeremiah Lowin <jlowin@users.noreply.github.com>

Author: jlowin

tests/cli/test_run.py

@@ -101,6 +101,11 @@ async def test_load_server_directory(self, tmp_path):
 class TestMCPConfig:
     """Test MCPConfig functionality."""
 
+    @pytest.mark.timeout(15)
+    @pytest.mark.skipif(
+        sys.platform == "win32",
+        reason="Stdio subprocess lifecycle is unreliable on Windows CI",
+    )
     async def test_run_mcp_config(self, tmp_path: Path):
         """Test creating a server from an MCPConfig file."""
         server_script = inspect.cleandoc("""