Fix dynamic sampleRequest (microsoft#211659)

Fix microsoft/vscode-copilot-release#1165

Author: roblourens

src/vs/workbench/api/common/extHostChatAgents2.ts

@@ -408,6 +408,7 @@ class ExtHostChatAgent {
 	private _helpTextPrefix: string | vscode.MarkdownString | undefined;
 	private _helpTextVariablesPrefix: string | vscode.MarkdownString | undefined;
 	private _helpTextPostfix: string | vscode.MarkdownString | undefined;
+	private _sampleRequest?: string;
 	private _isSecondary: boolean | undefined;
 	private _onDidReceiveFeedback = new Emitter<vscode.ChatResultFeedback>();
 	private _onDidPerformAction = new Emitter<vscode.ChatUserActionEvent>();
@@ -512,6 +513,7 @@ class ExtHostChatAgent {
 					helpTextPrefix: (!this._helpTextPrefix || typeof this._helpTextPrefix === 'string') ? this._helpTextPrefix : typeConvert.MarkdownString.from(this._helpTextPrefix),
 					helpTextVariablesPrefix: (!this._helpTextVariablesPrefix || typeof this._helpTextVariablesPrefix === 'string') ? this._helpTextVariablesPrefix : typeConvert.MarkdownString.from(this._helpTextVariablesPrefix),
 					helpTextPostfix: (!this._helpTextPostfix || typeof this._helpTextPostfix === 'string') ? this._helpTextPostfix : typeConvert.MarkdownString.from(this._helpTextPostfix),
+					sampleRequest: this._sampleRequest,
 					supportIssueReporting: this._supportIssueReporting,
 					requester: this._requester
 				});
@@ -599,6 +601,13 @@ class ExtHostChatAgent {
 				that._isSecondary = v;
 				updateMetadataSoon();
 			},
+			get sampleRequest() {
+				return that._sampleRequest;
+			},
+			set sampleRequest(v) {
+				that._sampleRequest = v;
+				updateMetadataSoon();
+			},
 			get supportIssueReporting() {
 				checkProposedApiEnabled(that.extension, 'chatParticipantAdditions');
 				return that._supportIssueReporting;

src/vscode-dts/vscode.proposed.chatParticipant.d.ts

@@ -209,6 +209,11 @@ declare module 'vscode' {
 			dark: Uri;
 		} | ThemeIcon;
 
+		/**
+		 * When the user clicks this participant in `/help`, this text will be submitted to this participant.
+		 */
+		sampleRequest?: string;
+
 		/**
 		 * The handler for requests to this participant.
 		 */