Metrics API/SDK specification reaches “Stable”. Together with the stable version of the specification, we should expect release candidates from multiple language clients, similar to what we had for tracing. Depending on the actual progress, the API specification might reach Stable earlier than the SDK.

11/09/2021

• Metrics API specification reaches Stable.
• Language clients can release RC or stable versions of the API package depending on their progress.

11/30/2021

• Metrics SDK specification reaches Stable.
• Language clients can release RC or stable versions of the SDK package depending on their progress.