chore: standardize on .NET 10 (LTS) across docs, codegen, CI, and fixtures

.github/agents/tests/codegen-pipeline.Tests.ps1

@@ -305,7 +305,7 @@ Describe 'nuget-metadata' {
             $csproj | Should -Match '<Authors>IntelliTect</Authors>'
             $csproj | Should -Match '<RepositoryUrl>https://github\.com/example/example</RepositoryUrl>'
             $csproj | Should -Match '<PackageTags>example;api;wrapper</PackageTags>'
-            $csproj | Should -Match '<TargetFramework>net8\.0</TargetFramework>'
+            $csproj | Should -Match '<TargetFramework>net10\.0</TargetFramework>'
         } finally { Remove-Item -Recurse -Force $out }
     }
 }

.github/agents/tests/csharp-templates.Tests.ps1

@@ -196,7 +196,7 @@ Describe "Buildable output" {
             Set-Content -LiteralPath $kv.Value -Value $expanded -NoNewline
         }
 
-        $csproj = "<Project Sdk=`"Microsoft.NET.Sdk`">`n  <PropertyGroup>`n    <TargetFramework>net8.0</TargetFramework>`n    <Nullable>enable</Nullable>`n    <ImplicitUsings>enable</ImplicitUsings>`n    <RootNamespace>Contoso</RootNamespace>`n    <AssemblyName>Contoso</AssemblyName>`n  </PropertyGroup>`n  <ItemGroup>`n    <PackageReference Include=`"Microsoft.Extensions.Logging.Abstractions`" Version=`"8.0.0`" />`n    <PackageReference Include=`"Microsoft.Playwright`" Version=`"1.49.0`" />`n    <PackageReference Include=`"System.Security.Cryptography.ProtectedData`" Version=`"8.0.0`" />`n  </ItemGroup>`n</Project>`n"
+        $csproj = "<Project Sdk=`"Microsoft.NET.Sdk`">`n  <PropertyGroup>`n    <TargetFramework>net10.0</TargetFramework>`n    <Nullable>enable</Nullable>`n    <ImplicitUsings>enable</ImplicitUsings>`n    <RootNamespace>Contoso</RootNamespace>`n    <AssemblyName>Contoso</AssemblyName>`n  </PropertyGroup>`n  <ItemGroup>`n    <PackageReference Include=`"Microsoft.Extensions.Logging.Abstractions`" Version=`"8.0.0`" />`n    <PackageReference Include=`"Microsoft.Playwright`" Version=`"1.49.0`" />`n    <PackageReference Include=`"System.Security.Cryptography.ProtectedData`" Version=`"8.0.0`" />`n  </ItemGroup>`n</Project>`n"
         Set-Content -LiteralPath (Join-Path $script:BuildDir "Contoso.csproj") -Value $csproj -NoNewline
 
         Push-Location $script:BuildDir

.github/agents/tests/oauth-templates.Tests.ps1

@@ -142,7 +142,7 @@ Describe "OAuth buildable output" {
             Set-Content -LiteralPath $kv.Value -Value $expanded -NoNewline
         }
 
-        $csproj = "<Project Sdk=`"Microsoft.NET.Sdk`">`n  <PropertyGroup>`n    <TargetFramework>net8.0</TargetFramework>`n    <Nullable>enable</Nullable>`n    <ImplicitUsings>enable</ImplicitUsings>`n    <RootNamespace>Contoso</RootNamespace>`n    <AssemblyName>Contoso</AssemblyName>`n  </PropertyGroup>`n  <ItemGroup>`n    <PackageReference Include=`"Microsoft.Extensions.Logging.Abstractions`" Version=`"8.0.0`" />`n    <PackageReference Include=`"System.Security.Cryptography.ProtectedData`" Version=`"8.0.0`" />`n  </ItemGroup>`n</Project>`n"
+        $csproj = "<Project Sdk=`"Microsoft.NET.Sdk`">`n  <PropertyGroup>`n    <TargetFramework>net10.0</TargetFramework>`n    <Nullable>enable</Nullable>`n    <ImplicitUsings>enable</ImplicitUsings>`n    <RootNamespace>Contoso</RootNamespace>`n    <AssemblyName>Contoso</AssemblyName>`n  </PropertyGroup>`n  <ItemGroup>`n    <PackageReference Include=`"Microsoft.Extensions.Logging.Abstractions`" Version=`"8.0.0`" />`n    <PackageReference Include=`"System.Security.Cryptography.ProtectedData`" Version=`"8.0.0`" />`n  </ItemGroup>`n</Project>`n"
         Set-Content -LiteralPath (Join-Path $script:BuildDir "Contoso.csproj") -Value $csproj -NoNewline
 
         Push-Location $script:BuildDir

.github/agents/tests/secret-gate.Tests.ps1

@@ -172,8 +172,8 @@ Describe "ci workflow YAML" {
     It "runs on ubuntu-latest" {
         $script:CiBody | Should -Match 'ubuntu-latest'
     }
-    It "uses .NET 8.0 SDK" {
-        $script:CiBody | Should -Match '8\.0'
+    It "uses .NET 10.0 SDK" {
+        $script:CiBody | Should -Match '10\.0'
     }
     It "runs dotnet build and dotnet test" {
         $script:CiBody | Should -Match 'dotnet\s+build'

.github/copilot-instructions.md

@@ -48,7 +48,7 @@ sections. `Pull-SDLC.ai.ps1` does this automatically on first sync.
 This is a **C#/.NET** project. Discover the project's purpose, architecture, and full
 technology stack from the solution/project files, `README.md`, and NuGet package references.
 
-Key baseline technologies: C# / .NET 9+, xUnit, Moq.
+Key baseline technologies: C# / .NET 10+, xUnit, Moq.
 
 ## Language Detection
 

.github/instructions/project.instructions.md.template

@@ -45,7 +45,7 @@ matters for code generation:
 
 | Layer            | Technology |
 |------------------|------------|
-| Language/Runtime | (e.g. C# / .NET 9) |
+| Language/Runtime | (e.g. C# / .NET 10) |
 | Web framework    | (e.g. ASP.NET Core, Minimal APIs) |
 | Data access      | (e.g. EF Core, Dapper) |
 | Testing          | (e.g. xUnit + Moq + FluentAssertions) |

.github/workflows/validate-instructions.yml

@@ -232,7 +232,7 @@ jobs:
       - name: Set up .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: "8.0.x"
+          dotnet-version: "10.0.x"
 
       - name: Run Pester suite
         shell: pwsh

CLAUDE.md

@@ -106,7 +106,7 @@ Discover the project layout by examining the root directory. A typical C#/.NET p
 
 | Layer | Technology |
 |---|---|
-| Language | C# / .NET 9+ |
+| Language | C# / .NET 10+ |
 | Testing | xUnit, Moq, FluentAssertions |
 
 > Discover the full technology stack from solution/project files, `README.md`, and

run.Tests.ps1

@@ -22,7 +22,7 @@ function global:Initialize-RunTests {
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>$OutputType</OutputType>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
   </PropertyGroup>
 </Project>
 "@
@@ -31,7 +31,7 @@ function global:Initialize-RunTests {
             $xml = @"
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
   </PropertyGroup>
 </Project>
 "@
@@ -236,7 +236,7 @@ Describe 'Find-VsCodeLaunchProject' {
 {
   "version": "0.2.0",
   "configurations": [
-    { "name": "Launch DLL", "type": "coreclr", "request": "launch", "program": "${workspaceFolder}/src/App/bin/Debug/net9.0/App.dll" }
+    { "name": "Launch DLL", "type": "coreclr", "request": "launch", "program": "${workspaceFolder}/src/App/bin/Debug/net10.0/App.dll" }
   ]
 }
 '@

templates/api-wrapper-scaffold/csharp/tests/Tests.csproj.tmpl

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <IsPackable>false</IsPackable>

templates/api-wrapper-scaffold/scripts/generate-wrapper.js

@@ -834,7 +834,7 @@ function emitCsproj(opts) {
     return [
         '<Project Sdk="Microsoft.NET.Sdk">',
         '  <PropertyGroup>',
-        '    <TargetFramework>net8.0</TargetFramework>',
+        '    <TargetFramework>net10.0</TargetFramework>',
         '    <OutputType>Exe</OutputType>',
         '    <Nullable>enable</Nullable>',
         '    <ImplicitUsings>enable</ImplicitUsings>',

templates/api-wrapper-scaffold/secret-gate/.github/workflows/ci.yml.tmpl

@@ -18,11 +18,11 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup .NET
         # Keep this version pinned to the same major.minor as the generated
-        # wrapper csproj's <TargetFramework> (currently net8.0). Update both
+        # wrapper csproj's <TargetFramework> (currently net10.0). Update both
         # together when bumping to a new LTS.
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 10.0.x
       - name: Restore
         run: dotnet restore
       - name: Build