From Tigran on the CNCF slack: OpenTelemetry’s protocol, OTLP v1.0.0 is released: https://github.com/open-telemetry/opentelemetry-proto/releases/tag/v1.0.0 There are no functional changes since the last release candidate v0.20.0. OTLP was already declared wire-level stable earlier. v1.0.0 adds more stability guarantees to the Protobuf definitions, see the guarantees list here: https://github.com/open-telemetry/opentelemetry-proto/#stability-definition