Use public Extensions property instead of internal ExtensionsCore

Copilot · stephentoub · Copilot · commit ce962063f882 · 2026-02-27T22:15:18.000Z
Co-authored-by: stephentoub &lt;2642209+stephentoub@users.noreply.github.com&gt;
diff --git a/src/ModelContextProtocol.Core/Server/McpServerImpl.cs b/src/ModelContextProtocol.Core/Server/McpServerImpl.cs
@@ -265,7 +265,7 @@ private void ConfigureCompletion(McpServerOptions options)
     private void ConfigureExperimental(McpServerOptions options)
     {
         ServerCapabilities.Experimental = options.Capabilities?.Experimental;
-        ServerCapabilities.ExtensionsCore = options.Capabilities?.ExtensionsCore;
+        ServerCapabilities.Extensions = options.Capabilities?.Extensions;
     }
 
     private void ConfigureResources(McpServerOptions options)

Original file line number	Diff line number	Diff line change
`@@ -265,7 +265,7 @@ private void ConfigureCompletion(McpServerOptions options)`
`265`	`265`	`private void ConfigureExperimental(McpServerOptions options)`
`266`	`266`	`{`
`267`	`267`	`ServerCapabilities.Experimental = options.Capabilities?.Experimental;`
`268`		`- ServerCapabilities.ExtensionsCore = options.Capabilities?.ExtensionsCore;`
	`268`	`+ ServerCapabilities.Extensions = options.Capabilities?.Extensions;`
`269`	`269`	`}`
`270`	`270`
`271`	`271`	`private void ConfigureResources(McpServerOptions options)`