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Summary
Add opt-in W3C trace context propagation (
traceparentandtracestate) from OpenCode to LLM providers, enabling end-to-end distributed tracing through gateways such as AgentGateway.Changes
LANGFUSE_PROPAGATE_TRACE_CONTEXT=true(disabled by default).Validation
Related
traceparenton the wire.Limitation: V2 transport hooks expose only the session ID, so propagation uses the current turn context rather than a specific generation. Langfuse metadata is not automatically propagated.