# Observability

Monitor and debug your GitHub Copilot SDK applications.

* [OpenTelemetry instrumentation](./opentelemetry.md): built-in TelemetryConfig and trace context propagation

For cost attribution and endpoint-level analysis, subscribe to `assistant.usage` events and inspect `apiEndpoint` (`AssistantUsageApiEndpoint`); see [Streaming events](../features/streaming-events.md).