Context Propagation

Context propagation lets you pass custom key-value data from a Client to Workflows, and from Workflows to Activities and Child Workflows, without threading values through every function signature.

Common use cases:

• Propagating distributed tracing IDs (e.g., OpenTelemetry trace context)
• Passing tenant IDs for multi-tenant applications
• Forwarding auth tokens or request-scoped metadata

Each SDK provides a context propagator interface you implement to control which values are injected and extracted. You register propagators on the Client, and the SDK calls them automatically at every boundary.

Implementing Context Propagation

Here are SDK-specific guides:

• Go