diff --git a/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py b/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py index c61131bf3f..38fbeb6551 100644 --- a/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py +++ b/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py @@ -13,6 +13,7 @@ from typing import ( import litellm from litellm._logging import verbose_logger +from litellm.litellm_core_utils.asyncify import run_async_function from litellm.llms.anthropic.experimental_pass_through.adapters.transformation import ( AnthropicAdapter, ) @@ -477,17 +478,52 @@ class LiteLLMMessagesToCompletionTransformationHandler: **kwargs, ) + # Run the context_management polyfill on the sync path too so that + # ``litellm.messages.create()`` callers don't silently lose edits like + # ``clear_tool_uses_20250919``. The dispatcher is async (so the + # ``compact_20260112`` editor can ``await`` the summarization model); + # bridge to it via ``run_async_function``. + context_management = kwargs.pop("context_management", None) + drop_params: Optional[bool] = kwargs.get("drop_params", None) + litellm_router = kwargs.pop("litellm_router", None) + if litellm_router is None: + try: + from litellm.proxy.proxy_server import llm_router as _proxy_router + + litellm_router = _proxy_router + except Exception: + pass + + polyfill_result = run_async_function( + _run_polyfill_if_enabled, + model=model, + messages=messages, + tools=tools, + system=system, + context_management_spec=context_management, + metadata=metadata, + drop_params=drop_params, + llm_router=litellm_router, + ) + + effective_messages = ( + polyfill_result.messages if polyfill_result is not None else messages + ) + effective_system = ( + polyfill_result.system if polyfill_result is not None else system + ) + ( completion_kwargs, tool_name_mapping, ) = LiteLLMMessagesToCompletionTransformationHandler._prepare_completion_kwargs( max_tokens=max_tokens, - messages=messages, + messages=effective_messages, model=model, metadata=metadata, stop_sequences=stop_sequences, stream=stream, - system=system, + system=effective_system, temperature=temperature, thinking=thinking, tool_choice=tool_choice, @@ -506,6 +542,7 @@ class LiteLLMMessagesToCompletionTransformationHandler: completion_response, model=model, tool_name_mapping=tool_name_mapping, + polyfill_result=polyfill_result, ) ) if transformed_stream is not None: @@ -515,6 +552,7 @@ class LiteLLMMessagesToCompletionTransformationHandler: anthropic_response = ANTHROPIC_ADAPTER.translate_completion_output_params( cast(ModelResponse, completion_response), tool_name_mapping=tool_name_mapping, + polyfill_result=polyfill_result, ) if anthropic_response is not None: return anthropic_response diff --git a/litellm/llms/anthropic/experimental_pass_through/adapters/streaming_iterator.py b/litellm/llms/anthropic/experimental_pass_through/adapters/streaming_iterator.py index de72dbea7f..3fdd2e283c 100644 --- a/litellm/llms/anthropic/experimental_pass_through/adapters/streaming_iterator.py +++ b/litellm/llms/anthropic/experimental_pass_through/adapters/streaming_iterator.py @@ -521,9 +521,13 @@ class AnthropicStreamWrapper(AdapterCompletionStreamWrapper): # Handle any remaining queued chunks before stopping if self.chunk_queue: return self.chunk_queue.popleft() - # Handle any held stop_reason chunk + # Handle any held stop_reason chunk — clear after capturing so a + # subsequent ``__anext__`` call doesn't re-emit the same chunk + # (matches the sync ``__next__`` path). if self.holding_stop_reason_chunk is not None: - return self.holding_stop_reason_chunk + held = self.holding_stop_reason_chunk + self.holding_stop_reason_chunk = None + return held if not self.sent_last_message: self.sent_last_message = True return {"type": "message_stop"} diff --git 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