fix(models): concurrency-safe reasoning patch via ContextVar#254
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Replace per-call monkey-patching of Converter.items_to_messages with a one-time global patch + ContextVar. Fixes RecursionError and reasoning field corruption under concurrent asyncio execution. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Converter.items_to_messageswith a one-time global patch +ContextVarRecursionErrorand reasoning field corruption under concurrent asyncio executionreasoning.pyChanges
utu/models/reasoning_chat_completions.py: Capture original function once at module load, useContextVarfor per-task strategy isolation, remove instance method_make_patched_items_to_messagesCloses #253