diff --git a/README.md b/README.md
index ad1d4175..da95e567 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ Module | Platform | Sample | Release Notes
[Microsoft.FeatureManagement](https://github.com/microsoft/FeatureManagement-Dotnet)
[](https://www.nuget.org/packages/Microsoft.FeatureManagement)| .NET Standard | [Sample](https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/Microsoft.Featuremanagement.md)
[Microsoft.FeatureManagement.AspNetCore](https://github.com/microsoft/FeatureManagement-Dotnet)
[](https://www.nuget.org/packages/Microsoft.FeatureManagement.AspNetCore) | ASP.NET Core | [Sample](https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/Microsoft.Featuremanagement.AspNetCore.md)
[Microsoft.FeatureManagement.Telemetry.ApplicationInsights](https://github.com/microsoft/FeatureManagement-Dotnet)
[](https://www.nuget.org/packages/Microsoft.FeatureManagement.Telemetry.ApplicationInsights) | .NET Standard | [Sample](https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/Microsoft.Featuremanagement.Telemetry.ApplicationInsights.md)
+[Microsoft.FeatureManagement.Telemetry.OpenTelemetry](https://github.com/microsoft/FeatureManagement-Dotnet)
[](https://www.nuget.org/packages/Microsoft.FeatureManagement.Telemetry.OpenTelemetry) | .NET Standard | [Sample](https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples/OpenTelemetryDemo) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/Microsoft.Featuremanagement.Telemetry.OpenTelemetry.md)
[spring-cloud-azure-feature-management](https://github.com/Azure/azure-sdk-for-java/tree/main/sdk/spring/spring-cloud-azure-feature-management)
[](https://search.maven.org/artifact/com.azure.spring/spring-cloud-azure-feature-management) | Spring Boot | [Sample](https://github.com/Azure-Samples/azure-spring-boot-samples/tree/main/appconfiguration/spring-cloud-azure-feature-management/spring-cloud-azure-feature-management-sample) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/SpringCloudAzureFeatureManagement.md)
[spring-cloud-azure-feature-management-web](https://github.com/Azure/azure-sdk-for-java/tree/main/sdk/spring/spring-cloud-azure-feature-management-web)
[](https://search.maven.org/artifact/com.azure.spring/spring-cloud-azure-feature-management-web) | Spring Boot | [Sample](https://github.com/Azure-Samples/azure-spring-boot-samples/tree/main/appconfiguration/spring-cloud-azure-feature-management-web/spring-cloud-azure-feature-management-web-sample) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/SpringCloudAzureFeatureManagement.md)
[featuremanagement](https://github.com/microsoft/FeatureManagement-Python)
[](https://pypi.org/project/FeatureManagement/) | Python | [Sample](https://github.com/microsoft/FeatureManagement-Python/tree/main/samples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/PythonFeatureManagement.md)
diff --git a/releaseNotes/Microsoft.Featuremanagement.AspNetCore.md b/releaseNotes/Microsoft.Featuremanagement.AspNetCore.md
index a39cd696..127ddec3 100644
--- a/releaseNotes/Microsoft.Featuremanagement.AspNetCore.md
+++ b/releaseNotes/Microsoft.Featuremanagement.AspNetCore.md
@@ -2,6 +2,10 @@
[Source code][source_code] | [Package (NuGet)][package] | [Samples][samples] | [Product documentation][docs]
+## 4.8.0 - September 24, 2026
+
+* Updated `Microsoft.FeatureManagement` reference to `4.8.0`. See the [release notes](./Microsoft.Featuremanagement.md) for more information on the changes.
+
## 4.7.0 - August 27, 2026
* Updated `Microsoft.FeatureManagement` reference to `4.7.0`. See the [release notes](./Microsoft.Featuremanagement.md) for more information on the changes.
diff --git a/releaseNotes/Microsoft.Featuremanagement.Telemetry.ApplicationInsights.md b/releaseNotes/Microsoft.Featuremanagement.Telemetry.ApplicationInsights.md
index 20927ed5..7bad0df9 100644
--- a/releaseNotes/Microsoft.Featuremanagement.Telemetry.ApplicationInsights.md
+++ b/releaseNotes/Microsoft.Featuremanagement.Telemetry.ApplicationInsights.md
@@ -2,6 +2,10 @@
[Source code][source_code] | [Package (NuGet)][package] | [Samples][samples] | [Product documentation][docs]
+## 4.8.0 - September 24, 2026
+
+* Updated `Microsoft.FeatureManagement` reference to `4.8.0`. See the [release notes](./Microsoft.Featuremanagement.md) for more information on the changes.
+
## 4.7.0 - August 27, 2026
* Updated `Microsoft.FeatureManagement` reference to `4.7.0`. See the [release notes](./Microsoft.Featuremanagement.md) for more information on the changes.
diff --git a/releaseNotes/Microsoft.Featuremanagement.Telemetry.OpenTelemetry.md b/releaseNotes/Microsoft.Featuremanagement.Telemetry.OpenTelemetry.md
new file mode 100644
index 00000000..798869ff
--- /dev/null
+++ b/releaseNotes/Microsoft.Featuremanagement.Telemetry.OpenTelemetry.md
@@ -0,0 +1,25 @@
+# Microsoft.FeatureManagement.Telemetry.OpenTelemetry
+
+[Source code][source_code] | [Package (NuGet)][package] | [Samples][samples] | [Product documentation][docs]
+
+## 4.8.0 - September 24, 2026
+
+* Introduced the `Microsoft.FeatureManagement.Telemetry.OpenTelemetry` package to publish feature flag evaluation events to OpenTelemetry-compatible backends and enrich spans and logs with `TargetingId` for correlation with user telemetry. Call `AddFeatureManagementProcessors()` on the OpenTelemetry builder before configuring exporters, such as `UseAzureMonitor()`, and enable telemetry on the feature flags to publish their evaluations. [#617](https://github.com/microsoft/FeatureManagement-Dotnet/pull/617)
+
+ ```csharp
+ using Microsoft.FeatureManagement;
+ using OpenTelemetry;
+
+ builder.Services.AddFeatureManagement();
+
+ builder.Services.AddOpenTelemetry()
+ .AddFeatureManagementProcessors();
+ ```
+
+ For an example that includes targeting and Azure Monitor exporter configuration, see the [OpenTelemetry sample][samples].
+
+
+[docs]: https://github.com/microsoft/FeatureManagement-Dotnet
+[package]: https://www.nuget.org/packages/Microsoft.FeatureManagement.Telemetry.OpenTelemetry
+[samples]: https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples/OpenTelemetryDemo
+[source_code]: https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/src/Microsoft.FeatureManagement.Telemetry.OpenTelemetry
diff --git a/releaseNotes/Microsoft.Featuremanagement.md b/releaseNotes/Microsoft.Featuremanagement.md
index a52a9d7b..1c475aa5 100644
--- a/releaseNotes/Microsoft.Featuremanagement.md
+++ b/releaseNotes/Microsoft.Featuremanagement.md
@@ -2,6 +2,16 @@
[Source code][source_code] | [Package (NuGet)][package] | [Samples][samples] | [Product documentation][docs]
+## 4.8.0 - September 24, 2026
+
+### Enhancements
+
+* Added OpenTelemetry integration through the new `Microsoft.FeatureManagement.Telemetry.OpenTelemetry` package, allowing applications to export feature evaluation events and correlate them with user telemetry. See the [OpenTelemetry release notes](./Microsoft.Featuremanagement.Telemetry.OpenTelemetry.md) for setup details. [#617](https://github.com/microsoft/FeatureManagement-Dotnet/pull/617)
+
+### Bug Fixes
+
+* Fixed a bug where a Microsoft-schema feature flag from an earlier configuration source could override the same flag's .NET-schema definition from a later source, causing its state and feature filters to be ignored. With `CustomConfigurationMergingEnabled` enabled, the last configuration source defining the flag now takes precedence across both schemas. [#621](https://github.com/microsoft/FeatureManagement-Dotnet/issues/621)
+
## 4.7.0 - August 27, 2026
### Enhancements