Move functionality out of IMcpClient/Server into extensions (#60)

src/mcpdotnet/Protocol/Messages/OperationNames.cs

@@ -0,0 +1,47 @@
+using McpDotNet.Protocol.Messages;
+using McpDotNet.Protocol.Types;
+using Microsoft.Extensions.Logging;
+
+namespace McpDotNet.Protocol.Messages;
+
+/// <summary>Provides names of standard operations for use with registering handlers.</summary>
+/// <remarks>
+/// These values should not be inspected or relied on for their exact values.
+/// They serve only as opaque keys. They will be stable for the lifetime of a process
+/// but may change between versions of this library.
+/// </remarks>
+public static class OperationNames
+{
+    /// <summary>Gets the name of the sampling operation.</summary>
+    public static string Sampling { get; } = "operation/sampling";
+
+    /// <summary>Gets the name of the roots operation.</summary>
+    public static string Roots { get; } = "operation/roots";
+
+    /// <summary>Gets the name of the list tools operation.</summary>
+    public static string ListTools { get; } = "operation/listTools";
+
+    /// <summary>Gets the name of the call tool operation.</summary>
+    public static string CallTool { get; } = "operation/callTool";
+
+    /// <summary>Gets the name of the list prompts operation.</summary>
+    public static string ListPrompts { get; } = "operation/listPrompts";
+
+    /// <summary>Gets the name of the get prompt operation.</summary>
+    public static string GetPrompt { get; } = "operation/getPrompt";
+
+    /// <summary>Gets the name of the list resources operation.</summary>
+    public static string ListResources { get; } = "operation/listResources";
+
+    /// <summary>Gets the name of the read resource operation.</summary>
+    public static string ReadResource { get; } = "operation/readResource";
+
+    /// <summary>Gets the name of the get completion operation.</summary>
+    public static string GetCompletion { get; } = "operation/getCompletion";
+
+    /// <summary>Gets the name of the subscribe to resources operation.</summary>
+    public static string SubscribeToResources { get; } = "operation/subscribeToResources";
+
+    /// <summary>Gets the name of the subscribe to resources operation.</summary>
+    public static string UnsubscribeFromResources { get; } = "operation/unsubscribeFromResources";
+}

src/mcpdotnet/Protocol/Types/Reference.cs

@@ -1,4 +1,5 @@
-using System.Text.Json.Serialization;
+using System.Diagnostics.CodeAnalysis;
+using System.Text.Json.Serialization;
 
 namespace McpDotNet.Protocol.Types;
 
@@ -37,7 +38,7 @@ public class Reference
     /// <summary>
     /// Validates the reference object.
     /// </summary>
-    public bool Validate(out string validationMessage)
+    public bool Validate([NotNullWhen(false)] out string? validationMessage)
     {
         if (Type == "ref/resource")
         {
@@ -61,7 +62,7 @@ public class Reference
             return false;
         }
 
-        validationMessage = string.Empty;
+        validationMessage = null;
         return true;
     }
 }