hermes: normalize routed vision messages

services/hermes/scripts/codex_broker.py

@@ -224,7 +224,7 @@ def _upstream_headers(token: str) -> dict[str, str]:
 def _normalize_input_images(response_input: list[Any]) -> None:
     """Normalize Chat-Completions image parts for the Codex Responses API."""
     for item in response_input:
-        if not isinstance(item, dict) or item.get("type") != "message":
+        if not isinstance(item, dict):
             continue
         content = item.get("content")
         if not isinstance(content, list):

testing/tests/test_hermes_chat_quality.py

@@ -779,6 +779,28 @@ def test_codex_broker_auth_and_request_contract(tmp_path: Path, monkeypatch):
         "image_url": "data:image/png;base64,cHJpdmF0ZQ==",
         "detail": "high",
     }
+    switchyard_image_items = [
+        {
+            "role": "user",
+            "content": [
+                {"type": "input_text", "text": "What color is this?"},
+                {
+                    "type": "image_url",
+                    "image_url": {
+                        "url": "data:image/png;base64,cHJpdmF0ZQ==",
+                        "detail": "auto",
+                    },
+                },
+            ],
+        }
+    ]
+    assert module._validate_payload(
+        {"model": "gpt-5.6-terra", "input": switchyard_image_items}
+    )["input"][0]["content"][1] == {
+        "type": "input_image",
+        "image_url": "data:image/png;base64,cHJpdmF0ZQ==",
+        "detail": "auto",
+    }
     with pytest.raises(ValueError, match="non-empty Responses image URL"):
         module._validate_payload(
             {