From d711cfbc84dac36685c391baf8e83bd3134919b0 Mon Sep 17 00:00:00 2001
From: David-Wu1119 <133224895+David-Wu1119@users.noreply.github.com>
Date: Thu, 13 Aug 2026 18:01:06 +0800
Subject: [PATCH] fix(anthropic): annotate the error-chunk builder for the
 type-discipline gate

_make_error_chunk returns a dict because the chunk is appended to
_chunk_queue and returned from __anext__, both of which are typed
dict[str, Any] by the existing iterator contract in this file. Record
that with a mutable-ok reason so the LIT001 budget stays flat.
---
 .../responses_adapters/streaming_iterator.py                  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/litellm/llms/anthropic/experimental_pass_through/responses_adapters/streaming_iterator.py b/litellm/llms/anthropic/experimental_pass_through/responses_adapters/streaming_iterator.py
index 967329d9c42..0ecac7c879f 100644
--- a/litellm/llms/anthropic/experimental_pass_through/responses_adapters/streaming_iterator.py
+++ b/litellm/llms/anthropic/experimental_pass_through/responses_adapters/streaming_iterator.py
@@ -124,7 +124,9 @@ class AnthropicResponsesStreamWrapper:
         self._current_block_index += 1
         return self._current_block_index
 
-    def _make_error_chunk(self, message: str) -> dict[str, Any]:
+    def _make_error_chunk(
+        self, message: str
+    ) -> dict[str, Any]:  # mutable-ok: queued into _chunk_queue and returned from __anext__, both typed dict[str, Any]
         return {
             "type": "error",
             "error": {"type": "api_error", "message": message},