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fix(anthropic): drop empty reasoning sentinel

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This commit is contained in:
Gennaro Malafronte 2026-04-23 01:13:49 +02:00
parent af42ce7209
commit 4eabe4367e
2 changed files with 31 additions and 1 deletions
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4
litellm/llms/anthropic/experimental_pass_through/adapters/transformation.py
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@ -664,7 +664,9 @@ class LiteLLMAnthropicMessagesAdapter:
if len(tool_calls) > 0:
assistant_message["tool_calls"] = tool_calls # type: ignore
assistant_message["reasoning_content"] = (
"".join(reasoning_content_parts) if len(reasoning_content_parts) > 0 else " "
"".join(reasoning_content_parts)
if len(reasoning_content_parts) > 0
else None
) # type: ignore
if len(thinking_blocks) > 0:
assistant_message["thinking_blocks"] = thinking_blocks # type: ignore

28
tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
View file

@ -1007,6 +1007,34 @@ def test_translate_anthropic_messages_to_openai_tool_use_with_signature():
)
def test_translate_anthropic_messages_to_openai_tool_use_without_thinking_blocks():
anthropic_messages = [
AnthropicMessagesUserMessageParam(
role="user",
content=[{"type": "text", "text": "Use the weather tool."}],
),
AnthopicMessagesAssistantMessageParam(
role="assistant",
content=[
{
"type": "tool_use",
"id": "toolu_01234",
"name": "get_weather",
"input": {"location": "Boston"},
}
],
),
]
adapter = LiteLLMAnthropicMessagesAdapter()
result = adapter.translate_anthropic_messages_to_openai(messages=anthropic_messages)
assert len(result) == 2
assert result[1]["role"] == "assistant"
assert len(result[1]["tool_calls"]) == 1
assert result[1].get("reasoning_content") is None
def test_translate_anthropic_messages_to_openai_tool_result_with_multiple_content_items():
"""
Test that tool_result with multiple content items creates a single tool message