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Fix multi reasoning_summary for openai #2162

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Fix multi reasoning_summary for openai #2162

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bff10d2
Fix multi reasoning_summary for openai
Disdjj Jul 9, 2025
8c781f8
Merge branch 'main' into main
Disdjj Jul 17, 2025
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15 changes: 12 additions & 3 deletions pydantic_ai_slim/pydantic_ai/models/openai.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1029,6 +1029,10 @@ class OpenAIResponsesStreamedResponse(StreamedResponse):
_response: AsyncIterable[responses.ResponseStreamEvent]
_timestamp: datetime

# Track reasoning summary parts to handle separate parts correctly
_reasoning_summary_part_counter: int = field(default=0, init=False)
_current_reasoning_summary_vendor_id: str | None = field(default=None, init=False)

async def _get_event_iterator(self) -> AsyncIterator[ModelResponseStreamEvent]: # noqa: C901
async for chunk in self._response:
if isinstance(chunk, responses.ResponseCompletedEvent):
Expand Down Expand Up @@ -1093,17 +1097,22 @@ async def _get_event_iterator(self) -> AsyncIterator[ModelResponseStreamEvent]:
pass

elif isinstance(chunk, responses.ResponseReasoningSummaryPartAddedEvent):
pass # there's nothing we need to do here
# Start a new reasoning summary part
self._reasoning_summary_part_counter += 1
self._current_reasoning_summary_vendor_id = f"{chunk.item_id}_part_{self._reasoning_summary_part_counter}"

elif isinstance(chunk, responses.ResponseReasoningSummaryPartDoneEvent):
pass # there's nothing we need to do here
# Mark the end of the current reasoning summary part
self._current_reasoning_summary_vendor_id = None

elif isinstance(chunk, responses.ResponseReasoningSummaryTextDoneEvent):
pass # there's nothing we need to do here

elif isinstance(chunk, responses.ResponseReasoningSummaryTextDeltaEvent):
# Use the current reasoning summary part's unique vendor_part_id
vendor_part_id = self._current_reasoning_summary_vendor_id or chunk.item_id
yield self._parts_manager.handle_thinking_delta(
vendor_part_id=chunk.item_id,
vendor_part_id=vendor_part_id,
content=chunk.delta,
signature=chunk.item_id,
)
Expand Down
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