Import dotnet-package-skills tool and add pipelines for CI/CD

LICENSE

@@ -1,7 +1,9 @@
-MIT License
+The MIT License (MIT)
 
 Copyright (c) 2026 NuGet
 
+All rights reserved.
+
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights

README.md

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 # Client.Tools
 
-This repository contains tools shipped by the NuGet Client team to help developers effectively use the latest NuGet features.
+This repository contains tools shipped by the NuGet Client team to help developers effectively use the latest NuGet features.
+
+## Tools
+
+- [dotnet-package-skills](dotnet-package-skills/README.md) copies agent skills bundled in NuGet packages into a repository's skills folder.
+
+## Build
+
+Run from the repository root on Windows, with PowerShell 7 and the root-pinned .NET SDK:
+
+```powershell
+eng\common\build.cmd -restore -build -test -pack -configuration Release
+```
+
+Install the .NET 8 runtime into the same .NET installation that Arcade selects. The SDK supplies
+the .NET 10 runtime. The build graph retains `eng\Infrastructure.proj` and includes the tool
+solution. Artifacts use Arcade's `artifacts\bin`, `obj`, `log`, `TestResults`, and
+`packages\Release\Shipping` layout.
+
+The public pipeline produces unsigned packages. The official pipeline uses Arcade's recursive
+signing with owner-approved MicroBuild/ESRP resources. Both publish NuGet packages as build
+artifacts only. See the [tool pipeline guide](eng/pipelines/dotnet-package-skills/README.md).

dotnet-package-skills/.gitignore

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+bin/
+obj/
+artifacts/
+node_modules/
+*.user
+.DS_Store
+.agents/

dotnet-package-skills/CONTRIBUTING.md

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+# How to contribute
+
+Thank you for your help. This tool is small and simple on purpose. Keep changes small and simple
+too.
+
+## Set up your computer
+
+Install the .NET SDK that the repository root's `global.json` selects. Install PowerShell 7.
+Install the .NET 8 runtime into the same .NET installation that Arcade uses. The SDK supplies the .NET 10 runtime. 
+The tool and its C# test suite target both net8.0 and net10.0. CI runs on Windows only. 
+Use the root SDK, Arcade imports, and public feeds. Do not add a tool-local `global.json` or `NuGet.config`.
+
+```powershell
+git clone https://github.com/NuGet/Client.Tools.git
+Set-Location .\Client.Tools
+eng\common\build.cmd -restore -build -test -pack -configuration Release
+```
+
+Try your build against a real repository without installing it:
+
+```powershell
+eng\common\dotnet.cmd artifacts\bin\DotnetPackageSkills\Release\net10.0\dotnet-package-skills.dll `
+  list --target C:\path\to\YourApp.sln
+```
+
+The build creates an unsigned tool package under `artifacts\packages\Release\Shipping`.
+It does not replace a globally installed tool. Only the official pipeline signs the package.
+
+## Layout
+
+```
+src/
+├── Program.cs              CLI surface: commands, options, exit codes
+├── SkillInstallService.cs     Orchestration. This is the only file that puts the steps in order.
+├── Cli/OutputWriter.cs     Writes reports for people to read
+├── Cli/SkillPicker.cs      The --interactive picker. It shows one page per screen.
+├── Cli/ITerminal.cs        An interface for console access, so tests can replace the console
+├── Cli/InteractiveSkills.cs  Picker-only metadata and selection mapping
+├── Infrastructure/         Process execution and the dotnet CLI wrapper
+├── NuGet/                  Target detection, package listing, cache path resolution
+└── Skills/                 Discovery, copying, version-change removal, the install manifest
+
+tests/                              xunit tests. Application tests use in-process fakes.
+```

dotnet-package-skills/Directory.Build.props

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+<Project>
+
+  <PropertyGroup>
+    <MicrosoftNETTestSdkVersion>17.14.1</MicrosoftNETTestSdkVersion>
+    <XUnitVersion>2.9.3</XUnitVersion>
+    <XUnitAnalyzersVersion>1.18.0</XUnitAnalyzersVersion>
+    <XUnitRunnerVisualStudioVersion>3.1.4</XUnitRunnerVisualStudioVersion>
+  </PropertyGroup>
+
+  <Import Project="..\Directory.Build.props" />
+
+  <PropertyGroup>
+    <SignAssembly>false</SignAssembly>
+    <IsShipping>false</IsShipping>
+    <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <InvariantGlobalization>true</InvariantGlobalization>
+  </PropertyGroup>
+
+</Project>

dotnet-package-skills/DotnetPackageSkills.slnx

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+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/DotnetPackageSkills.csproj" />
+  </Folder>
+  <Folder Name="/tests/">
+    <Project Path="tests/DotnetPackageSkills.Tests.csproj" />
+  </Folder>
+</Solution>