From 96b7fbb1fc39a22beba061c123126f7a71ee1575 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 11 Sep 2026 14:39:44 +0000
Subject: [PATCH] fix(responses): narrow response params without cast

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---
 litellm/responses/utils.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/litellm/responses/utils.py b/litellm/responses/utils.py
index 42bd99ccae2..d3418da585d 100644
--- a/litellm/responses/utils.py
+++ b/litellm/responses/utils.py
@@ -285,10 +285,11 @@ class ResponsesAPIRequestUtils:
         )
 
         # decode previous_response_id if it's a litellm encoded id
-        if "previous_response_id" in non_default_params:
+        previous_response_id: Final = non_default_params.get("previous_response_id")
+        if isinstance(previous_response_id, str):
             decoded_previous_response_id: Final = (
                 ResponsesAPIRequestUtils.decode_previous_response_id_to_original_previous_response_id(
-                    cast(str, non_default_params["previous_response_id"])
+                    previous_response_id
                 )
             )
             non_default_params["previous_response_id"] = decoded_previous_response_id
@@ -296,9 +297,8 @@ class ResponsesAPIRequestUtils:
         if "metadata" in non_default_params:
             from litellm.utils import add_openai_metadata
 
-            converted_metadata: Final = add_openai_metadata(
-                cast(Mapping[str, object] | None, non_default_params["metadata"])
-            )
+            raw_metadata: Final = non_default_params["metadata"]
+            converted_metadata: Final = add_openai_metadata(raw_metadata if _is_object_dict(raw_metadata) else None)
             if converted_metadata is not None:
                 non_default_params["metadata"] = converted_metadata
             else: