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fix(mistral): stream tool calls whole instead of fragmented - #7
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JulienRabault merged 1 commit intoSep 24, 2026
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The real Mistral API sends each tool call whole with complete arguments and groups parallel tool calls into a single delta. - Add `fragment_tool_calls: bool = True` parameter to `openai_chat_chunks` and `openai_stream`. - Pass `fragment_tool_calls=False` in the Mistral router so tool calls arrive whole in one chunk with index and full arguments. - Add `test_mistral_streaming_tool_calls_arrive_whole` in `tests/test_mistral.py`. Signed-off-by: Efe <efe@rexcode.co.uk>
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Thanks! Matches what the real API sends, the OpenAI-compatible providers keep fragmenting, and CI is green on all platforms.
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Summary
/mistral/v1/chat/completionswith tool calls, stream each tool call whole with its completearguments,id,name, andindex, grouping parallel tool calls into a single delta.langchain-mistralaiwhich expect complete tool calls./mistral/v1/chat/completions) is affected; other OpenAI-compatible endpoints continue to stream tool call argument fragments.Fixes #6
Validation
python -m ruff check llmock tests examples/retry_with_openai.pypytest -qtest_mistral_streaming_tool_calls_arrive_wholeintests/test_mistral.pyRisks
fragment_tool_calls: bool = True.