fix(core): reduce intrusive MCP errors and deduplicate diagnostics (#20232)

packages/core/src/config/config.ts

@@ -367,6 +367,7 @@ import {
   SimpleExtensionLoader,
 } from '../utils/extensionLoader.js';
 import { McpClientManager } from '../tools/mcp-client-manager.js';
+import { type McpContext } from '../tools/mcp-client.js';
 import type { EnvironmentSanitizationConfig } from '../services/environmentSanitization.js';
 import { getErrorMessage } from '../utils/errors.js';
 import {
@@ -580,7 +581,7 @@ export interface ConfigParameters {
   };
 }
 
-export class Config {
+export class Config implements McpContext {
   private toolRegistry!: ToolRegistry;
   private mcpClientManager?: McpClientManager;
   private allowedMcpServers: string[];
@@ -1769,6 +1770,33 @@ export class Config {
     return this.mcpClientManager;
   }
 
+  setUserInteractedWithMcp(): void {
+    this.mcpClientManager?.setUserInteractedWithMcp();
+  }
+
+  /** @deprecated Use getMcpClientManager().getLastError() directly */
+  getLastMcpError(serverName: string): string | undefined {
+    return this.mcpClientManager?.getLastError(serverName);
+  }
+
+  emitMcpDiagnostic(
+    severity: 'info' | 'warning' | 'error',
+    message: string,
+    error?: unknown,
+    serverName?: string,
+  ): void {
+    if (this.mcpClientManager) {
+      this.mcpClientManager.emitDiagnostic(
+        severity,
+        message,
+        error,
+        serverName,
+      );
+    } else {
+      coreEvents.emitFeedback(severity, message, error);
+    }
+  }
+
   getAllowedMcpServers(): string[] | undefined {
     return this.allowedMcpServers;
   }