Add Jupyter Chat Participant (@jupyter agent)

package.json

@@ -2185,6 +2185,15 @@
                 },
                 "when": "false"
             }
+        ],
+        "chatParticipants": [
+            {
+                "id": "jupyter.jupyterAgent",
+                "fullName": "Jupyter",
+                "name": "jupyter",
+                "description": "%jupyter.chatParticipant.description%",
+                "isSticky": true
+            }
         ]
     },
     "enabledApiProposals": [

package.nls.json

@@ -243,5 +243,6 @@
     "jupyter.languageModelTools.configure_notebook.displayName": "Configure Jupyter Notebook",
     "jupyter.languageModelTools.configure_notebook.userDescription": "Ensure Notebook is ready for use, such as running cells.",
     "jupyter.languageModelTools.notebook_list_packages.userDescription": "Lists Python packages available in the selected Notebook Kernel.",
-    "jupyter.languageModelTools.notebook_install_packages.userDescription": "Installs Python packages in the selected Notebook Kernel."
+    "jupyter.languageModelTools.notebook_install_packages.userDescription": "Installs Python packages in the selected Notebook Kernel.",
+    "jupyter.chatParticipant.description": "Ask questions about Jupyter notebooks, kernels, and data science in VS Code."
 }

src/standalone/chat/agent.node.ts

@@ -0,0 +1,54 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import * as vscode from 'vscode';
+import { logger } from '../../platform/logging';
+
+const JUPYTER_AGENT_ID = 'jupyter.jupyterAgent';
+
+/**
+ * Creates and registers a Jupyter chat participant (agent) that can handle
+ * user requests for Jupyter notebook assistance.
+ */
+export function registerJupyterChatAgent(context: vscode.ExtensionContext): void {
+    const agent = vscode.chat.createChatParticipant(JUPYTER_AGENT_ID, handleChatRequest);
+    agent.iconPath = new vscode.ThemeIcon('notebook');
+
+    context.subscriptions.push(agent);
+    logger.info('Jupyter Chat Agent registered');
+}
+
+/**
+ * Handles incoming chat requests to the Jupyter agent.
+ */
+async function handleChatRequest(
+    _request: vscode.ChatRequest,
+    _context: vscode.ChatContext,
+    stream: vscode.ChatResponseStream,
+    token: vscode.CancellationToken
+): Promise<vscode.ChatResult | undefined> {
+    if (token.isCancellationRequested) {
+        return undefined;
+    }
+
+    try {
+        // Stream a response to the user
+        stream.markdown(`I'm the Jupyter assistant. I can help you work with Jupyter notebooks.\n\n`);
+        stream.markdown(
+            `I can assist with:\n` +
+                `- Configuring notebooks and kernels\n` +
+                `- Installing packages in notebook kernels\n` +
+                `- Listing installed packages\n` +
+                `- Restarting kernels\n\n`
+        );
+        stream.markdown(`To get started, open a Jupyter notebook and I'll help you configure and work with it.`);
+
+        return {};
+    } catch (error) {
+        logger.error('Error handling Jupyter chat request', error);
+        stream.markdown(
+            `An error occurred while processing your request. Please check your input and try again, or report an issue if the problem persists.`
+        );
+        return undefined;
+    }
+}

src/standalone/chat/extension.node.ts

@@ -16,8 +16,12 @@ import { ConfigurePythonNotebookTool } from './configureNotebook.python.node';
 import { ConfigureNonPythonNotebookTool } from './configureNotebook.other.node';
 import { RestartKernelTool } from './restartKernelTool.node';
 import { INotebookCommandHandler } from '../../notebooks/notebookCommandListener';
+import { registerJupyterChatAgent } from './agent.node';
 
 export async function activate(context: vscode.ExtensionContext, serviceContainer: IServiceContainer): Promise<void> {
+    // Register the Jupyter Chat Agent
+    registerJupyterChatAgent(context);
+
     context.subscriptions.push(
         vscode.lm.registerTool(
             InstallPackagesTool.toolName,