Fix structured_output propagation in Graph nodes #3
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When using structured_output_model, the _build_node_input method now prefers the structured_output's JSON representation over str(result). This fixes issue strands-agents#1118 where structured output was not properly propagated from dependency nodes to subsequent nodes in a Graph. Co-authored-by: afarntrog <47332252+afarntrog@users.noreply.github.com>
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[WIP] Fix style compatibility issue in SDK
Fix structured_output propagation in Graph nodes
Dec 4, 2025
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Description
When using
structured_output_modelin Graph agents, output from dependency nodes was not propagated to subsequent nodes. The_build_node_inputmethod was callingstr(result)which only extracts message text content, ignoring thestructured_outputfield entirely.Changes:
_build_node_inputto preferstructured_output.model_dump_json()when availablestr(result)for backward compatibilityBefore: Second agent receives empty input
After: Second agent receives structured JSON
Related Issues
strands-agents#1118
Documentation PR
N/A
Type of Change
Bug fix
Testing
Added
test_graph_structured_output_propagation- verifies structured output is propagated as JSONAdded
test_graph_structured_output_fallback_to_text- verifies backward compatibility when no structured outputI ran
hatch run prepareChecklist
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