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Fix reasoning parsing when streaming from AWS SageMaker AI #2265

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alvarobartt wants to merge 3 commits into from
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Fix reasoning parsing when streaming from AWS SageMaker AI #2265

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db4dd60
Fix reasoning parsing when streaming from AWS SageMaker AI
alvarobartt May 8, 2026
2f3d143
Fix `{reasoning,reasoning_content}` check
alvarobartt May 12, 2026
87bb5eb
Fix `data` assignment and add safety note
alvarobartt May 12, 2026
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7 changes: 5 additions & 2 deletions src/strands/models/sagemaker.py
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Original file line number Diff line number Diff line change
Expand Up @@ -369,7 +369,10 @@ async def stream(
)

# Handle reasoning content
if choice["delta"].get("reasoning_content"):
# NOTE: Both `reasoning` and `reasoning_content` need to be handled as vLLM v0.16.0 deprecated
# the `reasoning_content` in favour of `reasoning`
# See https://github.com/vllm-project/vllm/pull/33402
if any(k in choice["delta"] for k in {"reasoning_content", "reasoning"}):
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if not reasoning_content_started:
yield self.format_chunk(
{"chunk_type": "content_start", "data_type": "reasoning_content"}
Expand All @@ -379,7 +382,7 @@ async def stream(
{
"chunk_type": "content_delta",
"data_type": "reasoning_content",
"data": choice["delta"]["reasoning_content"],
"data": choice["delta"].get("reasoning_content", choice["delta"].get("reasoning")),
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}
)

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