Add Nested Traces PromptFlow How-to #827
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hinthornw
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Jun 2, 2025
hinthornw
reviewed
Jun 2, 2025
hinthornw
reviewed
Jun 2, 2025
| return { | ||
| "processed": processed, | ||
| "langsmith_extra": { | ||
| "parent": headers |
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Why is the extra required here??
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Actually it is just to map the output of the parent node with the input of the child node. It can have a different name but we need to make sure to apply the correct mapping on the flow.dag.yaml file
- name: child
type: python
source:
type: code
path: child_node.py
function: child_node
inputs:
processed_text: ${parent.output.processed}
langsmith_extra: ${parent.output.langsmith_extra}
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Propagating LangSmith Traces in PromptFlow
This tutorial explains how to correctly propagate LangSmith traces in a PromptFlow application. We'll cover how to create nested traces, pass run tree information between nodes, and integrate LangGraph within a PromptFlow tool.