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litellm - 💡(How to fix) Fix Bug: v1.83.7 regression - tool_call function.arguments lost during OpenAI→Anthropic response conversion

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Setup: Claude Code → Anthropic protocol → litellm proxy → OpenAI protocol → glm-5.1

What happens: Model returns correct function.arguments (e.g. '{"file_path": "test.py"}'), but after litellm converts the response to Anthropic format, the tool_use.input becomes {} (empty dict).

Evidence from logs:

OpenAI response (correct): arguments='{"file_path": "D:\python-code\test\app.py"}' Anthropic response sent to client (broken): input: {} Next request from Claude Code includes the broken input: {} Regression: v1.79.1 does NOT have this issue. v1.83.7 does.

Related code changes in v1.83.7:

New _remove_thought_signatures_from_messages function with model_dump() calls New _process_assistant_message_tool_calls with model_dump() on tool_call Pydantic models from future import annotations added to utils.py

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#callback error#memory management#API rate limit#retriever error#indexing error

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litellm - 💡(How to fix) Fix Bug: v1.83.7 regression - tool_call function.arguments lost during OpenAI→Anthropic response conversion