Auto-open mcp.json after Self-Hosted MCP Server project creation

src/commands/createNewProject/NewProjectLanguageStep.ts

@@ -26,6 +26,7 @@ import { DotnetRuntimeStep } from './dotnetSteps/DotnetRuntimeStep';
 import { addJavaCreateProjectSteps } from './javaSteps/addJavaCreateProjectSteps';
 import { MCPDownloadSnippetsExecuteStep } from './mcpServerSteps/MCPDownloadSnippetsExecuteStep';
 import { MCPDownloadSnippetsPromptStep } from './mcpServerSteps/MCPDownloadSnippetsPromptStep';
+import { MCPOpenFileStep } from './mcpServerSteps/MCPOpenFileStep';
 import { MCPProjectCreateStep } from './mcpServerSteps/MCPProjectCreateStep';
 import { MCPServerLanguagePromptStep } from './mcpServerSteps/MCPServerLanguagePromptStep';
 
@@ -127,7 +128,7 @@ export class NewProjectLanguageStep extends AzureWizardPromptStep<IProjectWizard
                 break;
             case ProjectLanguage.SelfHostedMCPServer:
                 promptSteps.push(new MCPServerLanguagePromptStep(), new MCPDownloadSnippetsPromptStep());
-                executeSteps.push(new MCPDownloadSnippetsExecuteStep(), new MCPProjectCreateStep());
+                executeSteps.push(new MCPDownloadSnippetsExecuteStep(), new MCPProjectCreateStep(), new MCPOpenFileStep());
                 break;
             default:
                 executeSteps.push(new ScriptProjectCreateStep());

src/commands/createNewProject/mcpServerSteps/MCPOpenFileStep.ts

@@ -0,0 +1,38 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { AzExtFsExtra, AzureWizardExecuteStep } from '@microsoft/vscode-azext-utils';
+import * as path from 'path';
+import { Uri, window, workspace } from 'vscode';
+import { type MCPProjectWizardContext } from '../IProjectWizardContext';
+
+export class MCPOpenFileStep extends AzureWizardExecuteStep<MCPProjectWizardContext> {
+    public priority: number = 240; // Execute before OpenFolderStep (priority 250) but after other project setup
+
+    public async execute(context: MCPProjectWizardContext): Promise<void> {
+        const mcpJsonFilePath: string = path.join(context.projectPath, '.vscode', 'mcp.json');
+
+        if (await AzExtFsExtra.pathExists(mcpJsonFilePath)) {
+            const mcpJsonFile = await workspace.openTextDocument(Uri.file(mcpJsonFilePath));
+            await window.showTextDocument(mcpJsonFile, { preview: false });
+        }
+    }
+
+    public shouldExecute(context: MCPProjectWizardContext): boolean {
+        // Only execute if we're not opening the folder in a way that would reload the window
+        // If opening in current window or new window, the file open would be lost during reload
+        const openFolders = workspace.workspaceFolders || [];
+
+        // Handle AddToWorkspace: only if there are existing workspace folders
+        // (OpenFolderStep changes AddToWorkspace to OpenInCurrentWindow if no folders exist)
+        if (context.openBehavior === 'AddToWorkspace') {
+            return openFolders.length > 0;
+        }
+
+        // Always execute for these cases
+        return context.openBehavior === 'AlreadyOpen' || 
+               context.openBehavior === 'DontOpen';
+    }
+}