fix: accumulate text across tool calls for output_key in streaming mode#5599

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theonlychant wants to merge 2 commits intogoogle:mainfrom

theonlychant:fix/output-key-text-accumulation

Commits on May 6, 2026

fix: accumulate text across tool calls for output_key in streaming mode
theonlychant
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fix: accumulate all streamed text for output_key across tool calls
theonlychant
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