Add a flag to clear chat response content entirely (microsoft#198715)

This may become useful for codeblock vulnerability annotation work, before the API is fully finalized and available

src/vs/workbench/contrib/chat/common/chatModel.ts

@@ -115,6 +115,11 @@ export class Response implements IResponse {
 		return this._responseRepr;
 	}
 
+	clear(): void {
+		this._responseParts = [];
+		this._updateRepr(true);
+	}
+
 	updateContent(progress: IChatProgressResponseContent | IChatContent, quiet?: boolean): void {
 		if (progress.kind === 'content' || progress.kind === 'markdownContent') {
 			const responsePartLength = this._responseParts.length - 1;
@@ -310,7 +315,11 @@ export class ChatResponseModel extends Disposable implements IChatResponseModel
 		this._onDidChange.fire();
 	}
 
-	complete(): void {
+	complete(errorDetails?: IChatResponseErrorDetails): void {
+		if (errorDetails?.responseIsRedacted) {
+			this._response.clear();
+		}
+
 		this._isComplete = true;
 		this._onDidChange.fire();
 	}
@@ -689,12 +698,12 @@ export class ChatModel extends Disposable implements IChatModel {
 		request.response.setErrorDetails(rawResponse.errorDetails);
 	}
 
-	completeResponse(request: ChatRequestModel): void {
+	completeResponse(request: ChatRequestModel, errorDetails: IChatResponseErrorDetails | undefined): void {
 		if (!request.response) {
 			throw new Error('Call setResponse before completeResponse');
 		}
 
-		request.response.complete();
+		request.response.complete(errorDetails);
 	}
 
 	setFollowups(request: ChatRequestModel, followups: IChatFollowup[] | undefined): void {

src/vs/workbench/contrib/chat/common/chatService.ts

@@ -36,6 +36,7 @@ export interface IChatResponseErrorDetails {
 	message: string;
 	responseIsIncomplete?: boolean;
 	responseIsFiltered?: boolean;
+	responseIsRedacted?: boolean;
 }
 
 export interface IChatResponse {

src/vs/workbench/contrib/chat/common/chatServiceImpl.ts

@@ -590,10 +590,10 @@ export class ChatService extends Disposable implements IChatService {
 					if (agentOrCommandFollowups) {
 						agentOrCommandFollowups.then(followups => {
 							model.setFollowups(request, followups);
-							model.completeResponse(request);
+							model.completeResponse(request, rawResponse?.errorDetails);
 						});
 					} else {
-						model.completeResponse(request);
+						model.completeResponse(request, rawResponse?.errorDetails);
 					}
 				}
 			} finally {
@@ -656,7 +656,7 @@ export class ChatService extends Disposable implements IChatService {
 		if (response.followups !== undefined) {
 			model.setFollowups(request, response.followups);
 		}
-		model.completeResponse(request);
+		model.completeResponse(request, response.errorDetails);
 	}
 
 	cancelCurrentRequestForSession(sessionId: string): void {

src/vscode-dts/vscode.proposed.chatAgents2Additions.d.ts

@@ -15,6 +15,13 @@ declare module 'vscode' {
 		supportIssueReporting?: boolean;
 	}
 
+	export interface ChatAgentErrorDetails {
+		/**
+		 * If set to true, the message content is completely hidden. Only ChatAgentErrorDetails#message will be shown.
+		 */
+		responseIsRedacted?: boolean;
+	}
+
 	/**
 	 * This is temporary until inline references are fully supported and adopted
 	 */