Found different `gen_ai.conversation.id` value in invoke_agent LangGraph span

[pasainatan]

Describe the Bug

EDIT on 15 June: I am using auto_instrument() from sap-cloud-sdk, so the span is auto generated by the tracer instead of using the custom invoke_agent_span() function mentioned in this user guide.

Based on this All-in on AI decision, the calling system (that calls an agent) must generate a conversation identifier and set it in the W3C baggage header on every request within a conversation. However, when I use sap-cloud-sdk to instrument a LangGraph agent, there is a different value of gen_ai.conversation.id in the invoke_agent LangGraph span set by traceloop, which derives the conversation ID from the context id of the A2A server of a LangGraph agent. When gen_ai.conversation.id is set in the W3C baggage header, all spans have the same gen_ai.conversation.id value EXCEPT the invoke_agent LangGraph span, which is an inconsistency.

Steps to Reproduce

1. Run a LangGraph agent in https://github.tools.sap/Montana-AI-Singapore/a2a-server-samples/tree/main/appfnd-langgraph-basic and use auto_instrument() from sap-cloud-sdk
2. Copy .env.example and fill up the variables accordingly. I used a local MLflow server and sent the traces via http/protobuf
3. Run the agent uv run app and send a message to the agent and inject gen_ai.conversation.id in the W3C baggage header

This is how the trace spans look:
Root span: gen_ai.conversation.id == 48e35936-82ab-4f1a-beaf-b2fa4273ac5e, generated by the calling system

invoke_agent LangGraph span: gen_ai.conversation.id == b01915bf-48a2-4f8b-9681-19bc166553c5

Expected Behavior

I expect to see consistent values of gen_ai.conversation.id in all the spans in my trace, following the decision on All-in on AI. This could mean:

• blocking traceloop from setting gen_ai.conversation.id from traceloop.association.properties.thread_id, or
• overriding the value in invoke_agent LangGraph span such that the value is consistent.

Screenshots

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Used Versions

• Python version via python --version: 3.12.12
• SAP Cloud SDK for Python version: 0.19.3, but tested on 0.25.1 in a colleague's env
• Framework version (if applicable, e.g., Flask, FastAPI): ...

Installed packages via pip list or uv pip list

Package list here

Code Examples

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Stack Trace

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Log File

Log file

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Affected Development Phase

Development

Impact

Impaired

Timeline

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