refactor(server,client)!: drop ServerTasksCapabilityWithRuntime/ClientTasksCapabilityWithRuntime; capabilities.tasks no longer accepts runtime store fields

Author: felixweinberger

packages/client/src/client/client.ts

@@ -29,7 +29,6 @@ import type {
     Result,
     ServerCapabilities,
     SubscribeRequest,
-    TaskManagerOptions,
     Tool,
     Transport,
     UnsubscribeRequest
@@ -137,19 +136,11 @@ export function getSupportedElicitationModes(capabilities: ClientCapabilities['e
     return { supportsFormMode, supportsUrlMode };
 }
 
-/**
- * Extended tasks capability that includes runtime configuration (store, messageQueue).
- * The runtime-only fields are stripped before advertising capabilities to servers.
- */
-export type ClientTasksCapabilityWithRuntime = NonNullable<ClientCapabilities['tasks']> & TaskManagerOptions;
-
 export type ClientOptions = ProtocolOptions & {
     /**
      * Capabilities to advertise as being supported by this client.
      */
-    capabilities?: Omit<ClientCapabilities, 'tasks'> & {
-        tasks?: ClientTasksCapabilityWithRuntime;
-    };
+    capabilities?: ClientCapabilities;
 
     /**
      * JSON Schema validator for tool output validation.
@@ -245,14 +236,6 @@ export class Client extends Protocol<ClientContext> {
         this._jsonSchemaValidator = options?.jsonSchemaValidator ?? new DefaultJsonSchemaValidator();
         this._enforceStrictCapabilities = options?.enforceStrictCapabilities ?? false;
 
-        // Strip runtime-only fields from advertised capabilities
-        if (options?.capabilities?.tasks) {
-            // eslint-disable-next-line @typescript-eslint/no-unused-vars
-            const { taskStore, taskMessageQueue, defaultTaskPollInterval, maxTaskQueueSize, ...wireCapabilities } =
-                options.capabilities.tasks;
-            this._capabilities.tasks = wireCapabilities;
-        }
-
         // Store list changed config for setup after connection (when we know server capabilities)
         if (options?.listChanged) {
             this._pendingListChangedConfig = options.listChanged;

packages/server/src/server/server.ts

@@ -28,7 +28,6 @@ import type {
     Result,
     ServerCapabilities,
     ServerContext,
-    TaskManagerOptions,
     ToolResultContent,
     ToolUseContent
 } from '@modelcontextprotocol/core';
@@ -54,19 +53,11 @@ import { DefaultJsonSchemaValidator } from '@modelcontextprotocol/server/_shims'
 
 import { ExperimentalServerTasks } from '../experimental/tasks/server.js';
 
-/**
- * Extended tasks capability that includes runtime configuration (store, messageQueue).
- * The runtime-only fields are stripped before advertising capabilities to clients.
- */
-export type ServerTasksCapabilityWithRuntime = NonNullable<ServerCapabilities['tasks']> & TaskManagerOptions;
-
 export type ServerOptions = ProtocolOptions & {
     /**
      * Capabilities to advertise as being supported by this server.
      */
-    capabilities?: Omit<ServerCapabilities, 'tasks'> & {
-        tasks?: ServerTasksCapabilityWithRuntime;
-    };
+    capabilities?: ServerCapabilities;
 
     /**
      * Optional instructions describing how to use the server and its features.
@@ -116,14 +107,6 @@ export class Server extends Protocol<ServerContext> {
         this._instructions = options?.instructions;
         this._jsonSchemaValidator = options?.jsonSchemaValidator ?? new DefaultJsonSchemaValidator();
 
-        // Strip runtime-only fields from advertised capabilities
-        if (options?.capabilities?.tasks) {
-            // eslint-disable-next-line @typescript-eslint/no-unused-vars
-            const { taskStore, taskMessageQueue, defaultTaskPollInterval, maxTaskQueueSize, ...wireCapabilities } =
-                options.capabilities.tasks;
-            this._capabilities.tasks = wireCapabilities;
-        }
-
         this.setRequestHandler('initialize', request => this._oninitialize(request));
         this.setNotificationHandler('notifications/initialized', () => this.oninitialized?.());