test(mcp): fix whitespace in Claude transport serialization test

Agent-Id: agent-4b2c06a4-05c6-47fd-84e7-4c704eb9fa05
Linked-Note-Id: 3d4ca15e-5b56-430d-9ea4-f5b77e4207aa

Author: LittleCoinCoin

tests/regression/mcp/test_claude_transport_serialization.py

@@ -0,0 +1,66 @@
+"""Regression tests for Claude-family transport serialization."""
+
+import json
+from pathlib import Path
+
+import pytest
+
+from hatch.mcp_host_config.adapters.claude import ClaudeAdapter
+from hatch.mcp_host_config.models import MCPServerConfig
+
+try:
+    from wobble.decorators import regression_test
+except ImportError:
+
+    def regression_test(func):
+        return func
+
+
+FIXTURES_PATH = (
+    Path(__file__).resolve().parents[2]
+    / "test_data"
+    / "mcp_adapters"
+    / "claude_transport_regressions.json"
+)
+
+with open(FIXTURES_PATH) as f:
+    FIXTURES = json.load(f)
+
+
+def get_variant(host_name: str) -> str:
+    """Return Claude adapter variant from host name."""
+    return host_name.removeprefix("claude-")
+
+
+class TestClaudeTransportSerialization:
+    """Regression coverage for Claude Desktop/Code transport serialization."""
+
+    @pytest.mark.parametrize(
+        "test_case",
+        FIXTURES["remote_http"],
+        ids=lambda tc: tc["host"],
+    )
+    @regression_test
+    def test_remote_url_defaults_to_http_type(self, test_case):
+        """URL-based Claude configs serialize with explicit HTTP transport."""
+        adapter = ClaudeAdapter(variant=get_variant(test_case["host"]))
+        config = MCPServerConfig(**test_case["config"])
+
+        result = adapter.serialize(config)
+
+        assert result == test_case["expected"]
+
+    @pytest.mark.parametrize(
+        "test_case",
+        FIXTURES["stdio_without_type"],
+        ids=lambda tc: tc["host"],
+    )
+    @regression_test
+    def test_stdio_config_does_not_require_type_input(self, test_case):
+        """Stdio Claude configs still serialize when type is omitted."""
+        adapter = ClaudeAdapter(variant=get_variant(test_case["host"]))
+        config = MCPServerConfig(**test_case["config"])
+
+        result = adapter.serialize(config)
+
+        assert result == test_case["expected"]