fix(xecguard): use StandardLoggingGuardrailInformation in logging hook (#32911)

XecGuard's async_logging_hook wrote a bare dict to
standard_logging_object["guardrail_information"] while the typed
contract is Optional[List[StandardLoggingGuardrailInformation]].
Readers that iterated the field walked dict keys, raised on
info.get, or silently dropped the entry from guardrail usage
tracking and spend-log writes

Construct the typed entry and append it to the existing list or
create a new one, matching the shared helper pattern. Record the
configured guardrail name instead of a hardcoded "xecguard" and
pass the GuardrailEventHooks enum for guardrail_mode

litellm/proxy/guardrails/guardrail_hooks/xecguard/xecguard.py

@@ -49,7 +49,11 @@ from litellm.llms.custom_httpx.http_handler import (
     httpxSpecialProvider,
 )
 from litellm.types.guardrails import GuardrailEventHooks
-from litellm.types.utils import GenericGuardrailAPIInputs, GuardrailStatus
+from litellm.types.utils import (
+    GenericGuardrailAPIInputs,
+    GuardrailStatus,
+    StandardLoggingGuardrailInformation,
+)
 
 if TYPE_CHECKING:
     from litellm.litellm_core_utils.litellm_logging import (
@@ -246,16 +250,21 @@ class XecGuardGuardrail(CustomGuardrail):
                 "guardrail_intervened" if scan_result.get("decision") == "UNSAFE" else "success"
             )
             end_time = datetime.now()
-            kwargs["standard_logging_object"]["guardrail_information"] = {
-                "duration": (end_time - start_time).total_seconds(),
-                "end_time": end_time.timestamp(),
-                "guardrail_mode": "logging_only",
-                "guardrail_name": "xecguard",
-                "guardrail_response": scan_result,
-                "guardrail_status": guardrail_status,
-                "masked_entity_count": None,
-                "start_time": start_time.timestamp(),
-            }
+            slg = StandardLoggingGuardrailInformation(
+                guardrail_name=self.guardrail_name or "xecguard",
+                guardrail_mode=GuardrailEventHooks.logging_only,
+                guardrail_response=scan_result,
+                guardrail_status=guardrail_status,
+                start_time=start_time.timestamp(),
+                end_time=end_time.timestamp(),
+                duration=(end_time - start_time).total_seconds(),
+                masked_entity_count=None,
+            )
+            existing = kwargs["standard_logging_object"].get("guardrail_information")
+            if isinstance(existing, list):
+                existing.append(slg)
+            else:
+                kwargs["standard_logging_object"]["guardrail_information"] = [slg]
 
         except Exception as exc:
             verbose_proxy_logger.debug(

tests/test_litellm/proxy/guardrails/guardrail_hooks/test_xecguard.py

@@ -1644,12 +1644,37 @@ class TestXecGuardLoggingHook:
             )
             assert out_kwargs is kwargs
             assert out_result is result
-        info = kwargs["standard_logging_object"]["guardrail_information"]
+        info_list = kwargs["standard_logging_object"]["guardrail_information"]
+        assert isinstance(info_list, list), "guardrail_information must be a list"
+        assert len(info_list) == 1
+        info = info_list[0]
         assert info["guardrail_mode"] == "logging_only"
-        assert info["guardrail_name"] == "xecguard"
+        assert info["guardrail_name"] == "test-xecguard"
         assert info["guardrail_status"] == "success"
         assert info["guardrail_response"]["trace_id"] == "lg-1"
 
+    @pytest.mark.asyncio
+    async def test_async_logging_hook_appends_to_existing_guardrail_info(
+        self, xecguard_guardrail, mock_request_data
+    ):
+        resp = _make_response({"decision": "SAFE", "trace_id": "lg-4"})
+        prior_entry = {"guardrail_name": "other-guardrail"}
+        with patch.object(xecguard_guardrail.async_handler, "post", return_value=resp):
+            kwargs = {
+                **mock_request_data,
+                "standard_logging_object": {"guardrail_information": [prior_entry]},
+            }
+            await xecguard_guardrail.async_logging_hook(
+                kwargs=kwargs,
+                result=_build_model_response("some answer"),
+                call_type="acompletion",
+            )
+        info_list = kwargs["standard_logging_object"]["guardrail_information"]
+        assert len(info_list) == 2
+        assert info_list[0] is prior_entry
+        assert info_list[1]["guardrail_name"] == "test-xecguard"
+        assert info_list[1]["guardrail_response"]["trace_id"] == "lg-4"
+
     @pytest.mark.asyncio
     async def test_async_logging_hook_without_response_records_info(
         self, xecguard_guardrail, mock_request_data
@@ -1680,7 +1705,9 @@ class TestXecGuardLoggingHook:
                 result=_build_model_response("x"),
                 call_type="acompletion",
             )
-        info = kwargs["standard_logging_object"]["guardrail_information"]
+        info_list = kwargs["standard_logging_object"]["guardrail_information"]
+        assert isinstance(info_list, list), "guardrail_information must be a list"
+        info = info_list[0]
         assert info["guardrail_status"] == "guardrail_intervened"
 
     @pytest.mark.asyncio