Remove ExperimentalAttribute from official Extensions/Tasks/MRTR APIs and align MCPEXP001 usage (#1642)

src/ModelContextProtocol.Core/Protocol/ClientCapabilities.cs

@@ -1,5 +1,4 @@
 using System.ComponentModel;
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
 using ModelContextProtocol.Client;
 using ModelContextProtocol.Server;
@@ -84,7 +83,6 @@ public sealed class ClientCapabilities
     /// interoperability. Clients advertise extension support via this field during the initialization handshake.
     /// </para>
     /// </remarks>
-    [Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
     [JsonIgnore]
     public IDictionary<string, object>? Extensions
     {

src/ModelContextProtocol.Core/Protocol/InputRequest.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
@@ -20,7 +19,6 @@ namespace ModelContextProtocol.Protocol;
 /// parameters can be accessed via the typed accessor properties.
 /// </para>
 /// </remarks>
-[Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
 [JsonConverter(typeof(Converter))]
 public sealed class InputRequest
 {

src/ModelContextProtocol.Core/Protocol/InputRequiredException.cs

@@ -1,5 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
-
 namespace ModelContextProtocol.Protocol;
 
 /// <summary>
@@ -54,7 +52,6 @@ namespace ModelContextProtocol.Protocol;
 /// }
 /// </code>
 /// </example>
-[Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
 public class InputRequiredException : Exception
 {
     /// <summary>

src/ModelContextProtocol.Core/Protocol/InputRequiredResult.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
 
 namespace ModelContextProtocol.Protocol;
@@ -22,7 +21,6 @@ namespace ModelContextProtocol.Protocol;
 /// This type is part of the Multi Round-Trip Requests (MRTR) mechanism defined in SEP-2322.
 /// </para>
 /// </remarks>
-[Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
 public sealed class InputRequiredResult : Result
 {
     /// <summary>

src/ModelContextProtocol.Core/Protocol/InputResponse.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using System.Text.Json.Serialization.Metadata;
@@ -21,7 +20,6 @@ namespace ModelContextProtocol.Protocol;
 /// the corresponding <see cref="InputRequest.Method"/> key in the <see cref="InputRequiredResult.InputRequests"/> map.
 /// </para>
 /// </remarks>
-[Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
 [JsonConverter(typeof(Converter))]
 public sealed class InputResponse
 {

src/ModelContextProtocol.Core/Protocol/RequestParams.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Nodes;
 using System.Text.Json.Serialization;
 
@@ -36,7 +35,6 @@ public abstract class RequestParams
     /// the value is the client's response to that input request.
     /// </para>
     /// </remarks>
-    [Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
     [JsonIgnore]
     public IDictionary<string, InputResponse>? InputResponses
     {
@@ -59,7 +57,6 @@ public abstract class RequestParams
     /// exact value without modification.
     /// </para>
     /// </remarks>
-    [Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
     [JsonIgnore]
     public string? RequestState
     {

src/ModelContextProtocol.Core/Protocol/ServerCapabilities.cs

@@ -1,5 +1,4 @@
 using System.ComponentModel;
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
 using ModelContextProtocol.Server;
 
@@ -82,7 +81,6 @@ public sealed class ServerCapabilities
     /// interoperability. Servers advertise extension support via this field during the initialization handshake.
     /// </para>
     /// </remarks>
-    [Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
     [JsonIgnore]
     public IDictionary<string, object>? Extensions
     {

src/ModelContextProtocol.Core/Server/IMcpTaskStore.cs

@@ -1,5 +1,4 @@
 using ModelContextProtocol.Protocol;
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 
 namespace ModelContextProtocol.Server;
@@ -31,7 +30,6 @@ namespace ModelContextProtocol.Server;
 /// specification for details on the tasks extension.
 /// </para>
 /// </remarks>
-[Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
 public interface IMcpTaskStore
 {
     /// <summary>

src/ModelContextProtocol.Core/Server/InMemoryMcpTaskStore.cs

@@ -1,7 +1,6 @@
 using ModelContextProtocol.Protocol;
 using System.Collections.Concurrent;
 using System.Collections.Immutable;
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 
 namespace ModelContextProtocol.Server;
@@ -20,7 +19,6 @@ namespace ModelContextProtocol.Server;
 /// implement a custom <see cref="IMcpTaskStore"/>.
 /// </para>
 /// </remarks>
-[Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
 public class InMemoryMcpTaskStore : IMcpTaskStore
 {
     private readonly ConcurrentDictionary<string, McpTaskInfo> _tasks = new();

src/ModelContextProtocol.Core/Server/InputResponseReceivedEventArgs.cs

@@ -1,12 +1,10 @@
 using ModelContextProtocol.Protocol;
-using System.Diagnostics.CodeAnalysis;
 
 namespace ModelContextProtocol.Server;
 
 /// <summary>
 /// Provides data for the <see cref="IMcpTaskStore.InputResponseReceived"/> event.
 /// </summary>
-[Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
 public sealed class InputResponseReceivedEventArgs
 {
     /// <summary>

src/ModelContextProtocol.Core/Server/McpServer.Methods.cs

@@ -600,7 +600,6 @@ public abstract partial class McpServer : McpSession
     /// <param name="taskId">The task ID in the store.</param>
     /// <param name="store">The task store to write input requests to.</param>
     /// <returns>An <see cref="IDisposable"/> that restores the previous context when disposed.</returns>
-    [Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
     public IDisposable CreateMcpTaskScope(
         string taskId,
         IMcpTaskStore store)

src/ModelContextProtocol.Core/Server/McpServer.cs

@@ -81,7 +81,6 @@ public abstract partial class McpServer : McpSession
     /// the required feature) instead of throwing <see cref="Protocol.InputRequiredException"/>.
     /// </para>
     /// </remarks>
-    [Experimental(Experimentals.Mrtr_DiagnosticId, UrlFormat = Experimentals.Mrtr_Url)]
     public virtual bool IsMrtrSupported => false;
 
     /// <summary>

src/ModelContextProtocol.Core/Server/McpTaskExecutionContext.cs

@@ -1,5 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
-
 namespace ModelContextProtocol.Server;
 
 /// <summary>
@@ -9,7 +7,6 @@ namespace ModelContextProtocol.Server;
 /// and <see cref="McpServer.RequestRootsAsync(ModelContextProtocol.Protocol.ListRootsRequestParams, CancellationToken)"/>
 /// are redirected through the task store as input requests rather than sent directly to the client.
 /// </summary>
-[Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
 internal sealed class McpTaskExecutionContext
 {
     internal static readonly AsyncLocal<McpTaskExecutionContext?> Current = new();

src/ModelContextProtocol.Core/Server/McpTaskInfo.cs

@@ -1,5 +1,4 @@
 using ModelContextProtocol.Protocol;
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 
 namespace ModelContextProtocol.Server;
@@ -14,7 +13,6 @@ namespace ModelContextProtocol.Server;
 /// types (<see cref="CreateTaskResult"/>, <see cref="GetTaskResult"/>) when communicating with clients.
 /// </para>
 /// </remarks>
-[Experimental(Experimentals.Extensions_DiagnosticId, UrlFormat = Experimentals.Extensions_Url)]
 public sealed record McpTaskInfo(
     string TaskId,
     McpTaskStatus Status,