# OpenFeature core/v0.18.0

> CI/CD & App Delivery · 2026-09-25

A feature release with a breaking server-metric rename and a security dependency update. It also adds tracing and sync instrumentation capabilities.

## Action needed
- **[security]** The `go.opentelemetry.io/otel/sdk` dependency update
  - The `go.opentelemetry.io/otel/sdk` module was updated to `v1.45.0` in this release.

## Check if affected
- **[breaking]** The `feature_flag.flagd.sync.active_streams` metric rename
  - Applies if you use `feature_flag.flagd.sync.active_streams`.
  - The `feature_flag.flagd.sync.active_streams` metric was renamed to `feature_flag.flagd.sync.server.active_streams` in this release.
- **[breaking]** The `feature_flag.flagd.sync.stream.duration` metric rename
  - Applies if you use `feature_flag.flagd.sync.stream.duration`.
  - The `feature_flag.flagd.sync.stream.duration` metric was renamed to `feature_flag.flagd.sync.server.stream.duration` in this release.

## Other recorded changes
- 2 (added 2)

[Full analysis](https://ratatosk.io/en/releases/openfeature/core%2Fv0.18.0)

[Original release notes](https://github.com/open-feature/flagd/releases/tag/core/v0.18.0)