Set title for contributed chat session (#259108)

* setCustomTitle for contributedChatSession

* Add preferredTitle to allow setting

* tidy up

* extract out to get types happy

src/vs/workbench/contrib/chat/browser/chatEditor.ts

@@ -31,6 +31,7 @@ import { ChatWidget, IChatViewState } from './chatWidget.js';
 
 export interface IChatEditorOptions extends IEditorOptions {
 	target?: { sessionId: string } | { data: IExportableChatData | ISerializableChatData };
+	preferredTitle?: string;
 }
 
 export class ChatEditor extends EditorPane {
@@ -125,6 +126,7 @@ export class ChatEditor extends EditorPane {
 			throw new Error('ChatEditor lifecycle issue: no editor widget');
 		}
 
+		let isContributedChatSession = false;
 		if (input.resource.scheme === Schemas.vscodeChatSession) {
 			const identifier = ChatSessionUri.parse(input.resource);
 			if (identifier) {
@@ -132,6 +134,7 @@ export class ChatEditor extends EditorPane {
 				const contribution = contributions.find(c => c.type === identifier.chatSessionType);
 				if (contribution) {
 					this.widget.lockToCodingAgent(contribution.name, contribution.displayName);
+					isContributedChatSession = true;
 				} else {
 					this.widget.unlockFromCodingAgent();
 				}
@@ -148,6 +151,10 @@ export class ChatEditor extends EditorPane {
 		}
 		const viewState = options?.viewState ?? input.options.viewState;
 		this.updateModel(editorModel.model, viewState);
+
+		if (isContributedChatSession && options?.preferredTitle) {
+			editorModel.model.setCustomTitle(options?.preferredTitle);
+		}
 	}
 
 	private updateModel(model: IChatModel, viewState?: IChatViewState): void {

src/vs/workbench/contrib/chat/browser/chatSessions.ts

@@ -909,9 +909,14 @@ class SessionsViewPane extends ViewPane {
 				const ckey = this.contextKeyService.createKey('chatSessionType', element.provider.chatSessionType);
 				ckey.reset();
 
+				const options: IChatEditorOptions = {
+					pinned: true,
+					preferredTitle: element.label
+				};
+
 				await this.editorService.openEditor({
 					resource: ChatSessionUri.forSession(element.provider.chatSessionType, element.id),
-					options: { pinned: true } satisfies IChatEditorOptions
+					options,
 				});
 			}
 		}));

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

@@ -936,6 +936,7 @@ export interface IChatModel extends IDisposable {
 	acceptResponseProgress(request: IChatRequestModel, progress: IChatProgress, quiet?: boolean): void;
 	setResponse(request: IChatRequestModel, result: IChatAgentResult): void;
 	completeResponse(request: IChatRequestModel): void;
+	setCustomTitle(title: string): void;
 	toExport(): IExportableChatData;
 	toJSON(): ISerializableChatData;
 }
@@ -1105,6 +1106,7 @@ export type IChatChangeEvent =
 	| IChatSetHiddenEvent
 	| IChatCompletedRequestEvent
 	| IChatSetCheckpointEvent
+	| IChatSetCustomTitleEvent
 	;
 
 export interface IChatAddRequestEvent {
@@ -1174,6 +1176,11 @@ export interface IChatSetAgentEvent {
 	command?: IChatAgentCommand;
 }
 
+export interface IChatSetCustomTitleEvent {
+	kind: 'setCustomTitle';
+	title: string;
+}
+
 export interface IChatInitEvent {
 	kind: 'initialize';
 }
@@ -1556,8 +1563,9 @@ export class ChatModel extends Disposable implements IChatModel {
 		return request;
 	}
 
-	setCustomTitle(title: string): void {
+	public setCustomTitle(title: string): void {
 		this._customTitle = title;
+		this._onDidChange.fire({ kind: 'setCustomTitle', title });
 	}
 
 	updateRequest(request: ChatRequestModel, variableData: IChatRequestVariableData) {