Adopt chat context API changes (#1271)

Author: alexr00

chat-context-sample/src/extension.ts

@@ -5,9 +5,9 @@ const PROVIDER_ID = 'chat-context-sample.jsonLineCount';
 export function activate(context: vscode.ExtensionContext) {
 	console.log('Chat context sample extension is now active!');
 
-	// Register the chat context provider for JSON files
-	const provider: vscode.ChatContextProvider = {
-		provideChatContextForResource(options: { resource: vscode.Uri }, token: vscode.CancellationToken): vscode.ProviderResult<vscode.ChatContextItem | undefined> {
+	// Register the chat resource context provider for JSON files
+	const provider: vscode.ChatResourceContextProvider = {
+		provideResourceChatContext(options: { resource: vscode.Uri }, token: vscode.CancellationToken): vscode.ProviderResult<vscode.ChatContextItem | undefined> {
 			// Find the text document for this resource
 			const document = vscode.workspace.textDocuments.find(doc => doc.uri.toString() === options.resource.toString());
 			if (!document) {
@@ -18,22 +18,23 @@ export function activate(context: vscode.ExtensionContext) {
 			const fileName = options.resource.path.split('/').pop() ?? 'unknown';
 
 			return {
-				icon: new vscode.ThemeIcon('json'),
+				icon: new vscode.ThemeIcon('file'),
+				resourceUri: options.resource,
 				label: `${fileName}: ${lineCount} lines`,
 				modelDescription: `The JSON file "${fileName}" has ${lineCount} lines.`,
 				tooltip: new vscode.MarkdownString(`**Line count:** ${lineCount}`),
 				value: `File: ${fileName}\nLine count: ${lineCount}`
 			};
 		},
 
-		resolveChatContext(context: vscode.ChatContextItem, token: vscode.CancellationToken): vscode.ProviderResult<vscode.ChatContextItem> {
+		resolveResourceChatContext(context: vscode.ChatContextItem, token: vscode.CancellationToken): vscode.ProviderResult<vscode.ChatContextItem> {
 			// Context items already have values, so just return as-is
 			return context;
 		}
 	};
 
 	// Register with a document selector for JSON files
-	const disposable = vscode.chat.registerChatContextProvider(
+	const disposable = vscode.chat.registerChatResourceContextProvider(
 		[{ language: 'json' }, { language: 'jsonc' }],
 		PROVIDER_ID,
 		provider