fix: normalize live Chrome CDP endpoints for browser tools

tests/tools/test_browser_cdp_override.py

@@ -0,0 +1,47 @@
+from unittest.mock import Mock, patch
+
+
+HOST = "example-host"
+PORT = 9223
+WS_URL = f"ws://{HOST}:{PORT}/devtools/browser/abc123"
+HTTP_URL = f"http://{HOST}:{PORT}"
+VERSION_URL = f"{HTTP_URL}/json/version"
+
+
+class TestResolveCdpOverride:
+    def test_keeps_full_devtools_websocket_url(self):
+        from tools.browser_tool import _resolve_cdp_override
+
+        assert _resolve_cdp_override(WS_URL) == WS_URL
+
+    def test_resolves_http_discovery_endpoint_to_websocket(self):
+        from tools.browser_tool import _resolve_cdp_override
+
+        response = Mock()
+        response.raise_for_status.return_value = None
+        response.json.return_value = {"webSocketDebuggerUrl": WS_URL}
+
+        with patch("tools.browser_tool.requests.get", return_value=response) as mock_get:
+            resolved = _resolve_cdp_override(HTTP_URL)
+
+        assert resolved == WS_URL
+        mock_get.assert_called_once_with(VERSION_URL, timeout=10)
+
+    def test_resolves_bare_ws_hostport_to_discovery_websocket(self):
+        from tools.browser_tool import _resolve_cdp_override
+
+        response = Mock()
+        response.raise_for_status.return_value = None
+        response.json.return_value = {"webSocketDebuggerUrl": WS_URL}
+
+        with patch("tools.browser_tool.requests.get", return_value=response) as mock_get:
+            resolved = _resolve_cdp_override(f"ws://{HOST}:{PORT}")
+
+        assert resolved == WS_URL
+        mock_get.assert_called_once_with(VERSION_URL, timeout=10)
+
+    def test_falls_back_to_raw_url_when_discovery_fails(self):
+        from tools.browser_tool import _resolve_cdp_override
+
+        with patch("tools.browser_tool.requests.get", side_effect=RuntimeError("boom")):
+            assert _resolve_cdp_override(HTTP_URL) == HTTP_URL