Update documentation URLs to new vanity domain (#1414)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jeffhandley <1031940+jeffhandley@users.noreply.github.com>

Author: Copilot

.github/skills/bump-version/references/semver-assessment.md

@@ -4,7 +4,7 @@ This reference describes how to assess the appropriate [Semantic Versioning 2.0.
 
 ## SemVer Summary
 
-The SDK follows SemVer 2.0.0 as documented in the [C# SDK Versioning](https://modelcontextprotocol.github.io/csharp-sdk/versioning.html) documentation. Given a version `MAJOR.MINOR.PATCH`:
+The SDK follows SemVer 2.0.0 as documented in the [C# SDK Versioning](https://csharp.sdk.modelcontextprotocol.io/versioning.html) documentation. Given a version `MAJOR.MINOR.PATCH`:
 
 - **MAJOR**: Increment when incompatible API changes are included
 - **MINOR**: Increment when functionality is added in a backward-compatible manner

.github/skills/prepare-release/SKILL.md

@@ -214,7 +214,7 @@ The PR description combines release notes, ApiCompat, and ApiDiff into a single
 
 ### Breaking Changes
 
-Refer to the [C# SDK Versioning](https://modelcontextprotocol.github.io/csharp-sdk/versioning.html) documentation for details on versioning and breaking change policies.
+Refer to the [C# SDK Versioning](https://csharp.sdk.modelcontextprotocol.io/versioning.html) documentation for details on versioning and breaking change policies.
 
 1. **Description #PR**
    * Detail of the break
@@ -275,7 +275,7 @@ Omit empty sections. The preamble is **always required** — it is not inside a
 
 ## Breaking Changes
 
-Refer to the [C# SDK Versioning](https://modelcontextprotocol.github.io/csharp-sdk/versioning.html) documentation for details on versioning and breaking change policies.
+Refer to the [C# SDK Versioning](https://csharp.sdk.modelcontextprotocol.io/versioning.html) documentation for details on versioning and breaking change policies.
 
 1. **Description #PR**
    * Detail of the break

.github/skills/publish-release/SKILL.md

@@ -138,7 +138,7 @@ Omit empty sections. The preamble is **always required** — it is not inside a
 
 ## Breaking Changes
 
-Refer to the [C# SDK Versioning](https://modelcontextprotocol.github.io/csharp-sdk/versioning.html) documentation for details on versioning and breaking change policies.
+Refer to the [C# SDK Versioning](https://csharp.sdk.modelcontextprotocol.io/versioning.html) documentation for details on versioning and breaking change policies.
 
 1. **Description #PR**
    * Detail of the break

README.md

@@ -2,7 +2,7 @@
 
 [![NuGet version](https://img.shields.io/nuget/v/ModelContextProtocol.svg)](https://www.nuget.org/packages/ModelContextProtocol)
 
-The official C# SDK for the [Model Context Protocol](https://modelcontextprotocol.io/), enabling .NET applications, services, and libraries to implement and interact with MCP clients and servers. Please visit the [API documentation](https://modelcontextprotocol.github.io/csharp-sdk/api/ModelContextProtocol.html) for more details on available functionality.
+The official C# SDK for the [Model Context Protocol](https://modelcontextprotocol.io/), enabling .NET applications, services, and libraries to implement and interact with MCP clients and servers. Please visit the [API documentation](https://csharp.sdk.modelcontextprotocol.io/api/ModelContextProtocol.html) for more details on available functionality.
 
 ## Packages
 
@@ -16,9 +16,9 @@ This SDK consists of three main packages:
 
 ## Getting Started
 
-To get started, see the [Getting Started](https://modelcontextprotocol.github.io/csharp-sdk/concepts/getting-started.html) guide in the conceptual documentation for installation instructions, package-selection guidance, and complete examples for both clients and servers.
+To get started, see the [Getting Started](https://csharp.sdk.modelcontextprotocol.io/concepts/getting-started.html) guide in the conceptual documentation for installation instructions, package-selection guidance, and complete examples for both clients and servers.
 
-You can also browse the [samples](samples) directory and the [API documentation](https://modelcontextprotocol.github.io/csharp-sdk/api/ModelContextProtocol.html) for more details on available functionality.
+You can also browse the [samples](samples) directory and the [API documentation](https://csharp.sdk.modelcontextprotocol.io/api/ModelContextProtocol.html) for more details on available functionality.
 
 ## About MCP
 
@@ -27,7 +27,7 @@ The Model Context Protocol (MCP) is an open protocol that standardizes how appli
 For more information about MCP:
 
 - [Official MCP Documentation](https://modelcontextprotocol.io/)
-- [MCP C# SDK Documentation](https://modelcontextprotocol.github.io/csharp-sdk/)
+- [MCP C# SDK Documentation](https://csharp.sdk.modelcontextprotocol.io/)
 - [Protocol Specification](https://modelcontextprotocol.io/specification/)
 - [GitHub Organization](https://github.com/modelcontextprotocol)
 

src/Directory.Build.props

@@ -2,7 +2,7 @@
   <Import Project="..\Directory.Build.props" />
 
   <PropertyGroup>
-    <PackageProjectUrl>https://modelcontextprotocol.github.io/csharp-sdk</PackageProjectUrl>
+    <PackageProjectUrl>https://csharp.sdk.modelcontextprotocol.io</PackageProjectUrl>
     <RepositoryUrl>https://github.com/modelcontextprotocol/csharp-sdk</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <VersionPrefix>1.1.0</VersionPrefix>

src/PACKAGE.md

@@ -2,7 +2,7 @@
 
 [![NuGet version](https://img.shields.io/nuget/v/ModelContextProtocol.svg)](https://www.nuget.org/packages/ModelContextProtocol)
 
-The official C# SDK for the [Model Context Protocol](https://modelcontextprotocol.io/), enabling .NET applications, services, and libraries to implement and interact with MCP clients and servers. Please visit the [API documentation](https://modelcontextprotocol.github.io/csharp-sdk/api/ModelContextProtocol.html) for more details on available functionality.
+The official C# SDK for the [Model Context Protocol](https://modelcontextprotocol.io/), enabling .NET applications, services, and libraries to implement and interact with MCP clients and servers. Please visit the [API documentation](https://csharp.sdk.modelcontextprotocol.io/api/ModelContextProtocol.html) for more details on available functionality.
 
 ## Packages
 
@@ -16,9 +16,9 @@ This SDK consists of three main packages:
 
 ## Getting Started
 
-To get started, see the [Getting Started](https://modelcontextprotocol.github.io/csharp-sdk/concepts/getting-started.html) guide for installation instructions, package-selection guidance, and complete examples for both clients and servers.
+To get started, see the [Getting Started](https://csharp.sdk.modelcontextprotocol.io/concepts/getting-started.html) guide for installation instructions, package-selection guidance, and complete examples for both clients and servers.
 
-You can also browse the [samples](https://github.com/modelcontextprotocol/csharp-sdk/tree/main/samples) directory and the [API documentation](https://modelcontextprotocol.github.io/csharp-sdk/api/ModelContextProtocol.html) for more details on available functionality.
+You can also browse the [samples](https://github.com/modelcontextprotocol/csharp-sdk/tree/main/samples) directory and the [API documentation](https://csharp.sdk.modelcontextprotocol.io/api/ModelContextProtocol.html) for more details on available functionality.
 
 ## About MCP
 
@@ -27,6 +27,6 @@ The Model Context Protocol (MCP) is an open protocol that standardizes how appli
 For more information about MCP:
 
 - [Official MCP Documentation](https://modelcontextprotocol.io/)
-- [MCP C# SDK Documentation](https://modelcontextprotocol.github.io/csharp-sdk/)
+- [MCP C# SDK Documentation](https://csharp.sdk.modelcontextprotocol.io/)
 - [Protocol Specification](https://modelcontextprotocol.io/specification/)
 - [GitHub Organization](https://github.com/modelcontextprotocol)