Skip to main content
Add custom span-level attributes to a specific LangChain component’s metadata. Attributes are stored in the component’s metadata and automatically included in OTel spans when the component executes. Unlike session attributes, these are scoped to individual components.

​
Parameters

​
node
BaseLanguageModel | BaseRetriever | BaseTool
required
The LangChain component to annotate (modified in place).
​
kwargs
Any
Arbitrary key-value attributes. Keys matching known FiddlerSpanAttributes values are set directly; all others are prefixed with fiddler.span.user..

​
Returns

None Example: default from langchain_openai import ChatOpenAI from fiddler_langgraph import add_span_attributes llm = ChatOpenAI(model=“gpt-4”) add_span_attributes(llm, model_tier=“premium”, use_case=“summarization”)