feat: add net8.0 target framework

AGENTS.md

@@ -13,7 +13,7 @@ NuGet package that wires up OpenTelemetry (tracing, metrics, logging) for
 ```
 src/
   Directory.Build.props                            # Shared props: nullable, implicit usings, warnings-as-errors, style enforced in build
-  OpenTelemetryExtension.Configuration/             # Library (netstandard2.0 + net10.0) — the shipped NuGet package
+  OpenTelemetryExtension.Configuration/             # Library (netstandard2.0 + net8.0 + net10.0) — the shipped NuGet package
   OpenTelemetryExtension.Configuration.Tests/       # xUnit unit tests (net10.0, in-process, Category=Unit)
   OpenTelemetryExtension.Configuration.IntegrationTests/  # Integration tests (net10.0, Category=Integration) — query a live OpenObserve
   OpenTelemetryExtension.Configuration.Sample.WebApi/  # ASP.NET Core sample app (net10.0)
@@ -125,9 +125,12 @@ API to confirm the data was ingested.
 
 - C# with nullable reference types enabled — never use `!` to suppress
   nullability without a comment explaining why
-- Target frameworks: `netstandard2.0` and `net10.0` — guard net5.0+ APIs with
-  `#if NET5_0_OR_GREATER`. Do not use APIs unavailable on `netstandard2.0`
-  without the guard.
+- Target frameworks: `netstandard2.0`, `net8.0` and `net10.0` — guard net5.0+
+  APIs with `#if NET5_0_OR_GREATER` (or `#if !NETSTANDARD2_0`). Do not use APIs
+  unavailable on `netstandard2.0` without the guard. The ASP.NET Core
+  instrumentation is referenced for every target except `netstandard2.0`, so
+  `net8.0` and `net10.0` consumers get it; `netstandard2.0` (WPF/console) stays
+  lean.
 - `src/Directory.Build.props` applies to every project: `Nullable`,
   `ImplicitUsings`, `LangVersion=latest`, `TreatWarningsAsErrors=true`,
   `EnforceCodeStyleInBuild=true` — a style violation fails the build

README.md

@@ -25,9 +25,9 @@ Configurable OpenTelemetry setup for .NET applications providing **tracing, metr
 
 ## ✅ Requirements
 
-- A .NET target compatible with **`netstandard2.0`** — i.e. .NET Framework 4.6.1+, .NET 6/8/9/10, or .NET 10 directly.
+- A .NET target compatible with **`netstandard2.0`** — i.e. .NET Framework 4.6.1+, .NET 6/8/9/10, or directly the **`net8.0`** / **`net10.0`** builds.
 - An **OTLP-compatible backend** to receive the telemetry (collector, Jaeger, OpenObserve, the .NET Aspire Dashboard, …). See [Running Locally with a Backend](#-running-locally-with-a-backend).
-- ASP.NET Core instrumentation requires a **web target** (`net10.0` build); it is not included in the `netstandard2.0` build used by WPF/console apps.
+- ASP.NET Core instrumentation requires a modern .NET target (**`net8.0`** or **`net10.0`** build); it is not included in the `netstandard2.0` build used by WPF/console apps.
 
 ---
 

src/OpenTelemetryExtension.Configuration/OpenTelemetryExtension.Configuration.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFrameworks>netstandard2.0;net10.0</TargetFrameworks>
+		<TargetFrameworks>netstandard2.0;net8.0;net10.0</TargetFrameworks>
 		<Version>2.0.1</Version>
 		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>