New proposal for chat variable resolver (#205572)

* Tweak ChatFollowup

* Remove API TODOs

* New proposal for chat variable resolver

* Bump distro

* Enforce same-extension followup

* Add participant proposal to integration test folder

* Allow no participant for a followup

extensions/vscode-api-tests/package.json

@@ -10,6 +10,7 @@
     "chatParticipant",
     "languageModels",
     "defaultChatParticipant",
+    "chatVariableResolver",
     "contribViewsRemote",
     "contribStatusBarItems",
     "createFileSystemWatcher",

extensions/vscode-api-tests/src/singlefolder-tests/chat.test.ts

@@ -74,7 +74,7 @@ suite('chat', () => {
 	});
 
 	test('participant and variable', async () => {
-		disposables.push(chat.registerVariable('myVar', 'My variable', {
+		disposables.push(chat.registerChatVariableResolver('myVar', 'My variable', {
 			resolve(_name, _context, _token) {
 				return [{ level: ChatVariableLevel.Full, value: 'myValue' }];
 			}

package.json

@@ -1,7 +1,7 @@
 {
   "name": "code-oss-dev",
   "version": "1.87.0",
-  "distro": "af73a537ea203329debad3df7ca7b42b4799473f",
+  "distro": "b314654a31bdba8cd2b0c7548e931916d03416bf",
   "author": {
     "name": "Microsoft Corporation"
   },

src/vs/workbench/api/common/extHost.api.impl.ts

@@ -1409,8 +1409,8 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 				checkProposedApiEnabled(extension, 'chatProvider');
 				return extHostChatProvider.registerLanguageModel(extension, id, provider, metadata);
 			},
-			registerVariable(name: string, description: string, resolver: vscode.ChatVariableResolver) {
-				checkProposedApiEnabled(extension, 'chatParticipant');
+			registerChatVariableResolver(name: string, description: string, resolver: vscode.ChatVariableResolver) {
+				checkProposedApiEnabled(extension, 'chatVariableResolver');
 				return extHostChatVariables.registerVariableResolver(extension, name, description, resolver);
 			},
 			registerMappedEditsProvider(selector: vscode.DocumentSelector, provider: vscode.MappedEditsProvider) {

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

@@ -9,12 +9,13 @@ import { CancellationToken } from 'vs/base/common/cancellation';
 import { toErrorMessage } from 'vs/base/common/errorMessage';
 import { Emitter } from 'vs/base/common/event';
 import { IMarkdownString } from 'vs/base/common/htmlContent';
+import { Iterable } from 'vs/base/common/iterator';
 import { DisposableMap, DisposableStore } from 'vs/base/common/lifecycle';
 import { StopWatch } from 'vs/base/common/stopwatch';
 import { assertType } from 'vs/base/common/types';
 import { URI } from 'vs/base/common/uri';
 import { localize } from 'vs/nls';
-import { IExtensionDescription } from 'vs/platform/extensions/common/extensions';
+import { ExtensionIdentifier, IExtensionDescription } from 'vs/platform/extensions/common/extensions';
 import { ILogService } from 'vs/platform/log/common/log';
 import { ExtHostChatAgentsShape2, IChatAgentCompletionItem, IChatAgentHistoryEntryDto, IMainContext, MainContext, MainThreadChatAgentsShape2 } from 'vs/workbench/api/common/extHost.protocol';
 import { CommandsConverter, ExtHostCommands } from 'vs/workbench/api/common/extHostCommands';
@@ -261,6 +262,16 @@ export class ExtHostChatAgents2 implements ExtHostChatAgentsShape2 {
 
 		const ehResult = typeConvert.ChatAgentResult.to(result);
 		return (await agent.provideFollowups(ehResult, token))
+			.filter(f => {
+				// The followup must refer to a participant that exists from the same extension
+				const isValid = !f.participant || Iterable.some(
+					this._agents.values(),
+					a => a.id === f.participant && ExtensionIdentifier.equals(a.extension.identifier, agent.extension.identifier));
+				if (!isValid) {
+					this._logService.warn(`[@${agent.id}] ChatFollowup refers to an invalid participant: ${f.participant}`);
+				}
+				return isValid;
+			})
 			.map(f => typeConvert.ChatFollowup.from(f, request));
 	}
 

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

@@ -2201,18 +2201,16 @@ export namespace ChatFollowup {
 			agentId: followup.participant ?? request?.agentId ?? '',
 			subCommand: followup.command ?? request?.command,
 			message: followup.prompt,
-			title: followup.title,
-			tooltip: followup.tooltip,
+			title: followup.label
 		};
 	}
 
 	export function to(followup: IChatFollowup): vscode.ChatFollowup {
 		return {
 			prompt: followup.message,
-			title: followup.title,
+			label: followup.title,
 			participant: followup.agentId,
 			command: followup.subCommand,
-			tooltip: followup.tooltip,
 		};
 	}
 }

src/vs/workbench/services/extensions/common/extensionsApiProposals.ts

@@ -15,6 +15,7 @@ export const allApiProposals = Object.freeze({
 	chatParticipantAdditions: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.chatParticipantAdditions.d.ts',
 	chatProvider: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.chatProvider.d.ts',
 	chatTab: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.chatTab.d.ts',
+	chatVariableResolver: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.chatVariableResolver.d.ts',
 	codeActionAI: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.codeActionAI.d.ts',
 	codeActionRanges: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.codeActionRanges.d.ts',
 	codiconDecoration: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.codiconDecoration.d.ts',

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

@@ -5,7 +5,6 @@
 
 declare module 'vscode' {
 
-	// TODO@API name: Turn?
 	export class ChatRequestTurn {
 
 		/**
@@ -36,7 +35,6 @@ declare module 'vscode' {
 		private constructor(prompt: string, command: string | undefined, variables: ChatResolvedVariable[], participant: { extensionId: string; participant: string });
 	}
 
-	// TODO@API name: Turn?
 	export class ChatResponseTurn {
 
 		/**
@@ -185,9 +183,14 @@ declare module 'vscode' {
 		 */
 		prompt: string;
 
+		/**
+		 * A title to show the user, when it is different than the message.
+		 */
+		label?: string;
+
 		/**
 		 * By default, the followup goes to the same participant/command. But this property can be set to invoke a different participant.
-		 * TODO@API do extensions need to specify the extensionID of the participant here as well?
+		 * Followups can only invoke a participant that was contributed by the same extension.
 		 */
 		participant?: string;
 
@@ -195,17 +198,6 @@ declare module 'vscode' {
 		 * By default, the followup goes to the same participant/command. But this property can be set to invoke a different command.
 		 */
 		command?: string;
-
-		/**
-		 * A tooltip to show when hovering over the followup.
-		 */
-		tooltip?: string;
-
-		/**
-		 * A title to show the user, when it is different than the message.
-		 */
-		// TODO@API title vs tooltip?
-		title?: string;
 	}
 
 	/**
@@ -400,9 +392,6 @@ declare module 'vscode' {
 		 * @param value
 		 * @returns This stream.
 		 */
-		// TODO@API is this always inline or not
-		// TODO@API is this markdown or string?
-		// TODO@API this influences the rendering, it inserts new lines which is likely a bug
 		progress(value: string): ChatResponseStream;
 
 		/**
@@ -414,8 +403,6 @@ declare module 'vscode' {
 		 * @param value A uri or location
 		 * @returns This stream.
 		 */
-		// TODO@API support non-file uris, like http://example.com
-		// TODO@API support mapped edits
 		reference(value: Uri | Location): ChatResponseStream;
 
 		/**
@@ -426,8 +413,6 @@ declare module 'vscode' {
 		push(part: ChatResponsePart): ChatResponseStream;
 	}
 
-	// TODO@API should the name suffix differentiate between rendered items (XYZPart)
-	// and metadata like XYZItem
 	export class ChatResponseTextPart {
 		value: string;
 		constructor(value: string);
@@ -457,7 +442,6 @@ declare module 'vscode' {
 
 	export class ChatResponseProgressPart {
 		value: string;
-		// TODO@API inline
 		constructor(value: string);
 	}
 
@@ -489,21 +473,11 @@ declare module 'vscode' {
 		 * @returns A new chat participant
 		 */
 		export function createChatParticipant(name: string, handler: ChatRequestHandler): ChatParticipant;
-
-		/**
-		 * Register a variable which can be used in a chat request to any participant.
-		 * @param name The name of the variable, to be used in the chat input as `#name`.
-		 * @param description A description of the variable for the chat input suggest widget.
-		 * @param resolver Will be called to provide the chat variable's value when it is used.
-		 */
-		// TODO@API NAME: registerChatVariable, registerChatVariableResolver
-		export function registerVariable(name: string, description: string, resolver: ChatVariableResolver): Disposable;
 	}
 
 	/**
 	 * The detail level of this chat variable value.
 	 */
-	// TODO@API maybe for round2
 	export enum ChatVariableLevel {
 		Short = 1,
 		Medium = 2,
@@ -526,21 +500,4 @@ declare module 'vscode' {
 		 */
 		description?: string;
 	}
-
-	export interface ChatVariableContext {
-		/**
-		 * The message entered by the user, which includes this variable.
-		 */
-		prompt: string;
-	}
-
-	export interface ChatVariableResolver {
-		/**
-		 * A callback to resolve the value of a chat variable.
-		 * @param name The name of the variable.
-		 * @param context Contextual information about this chat request.
-		 * @param token A cancellation token.
-		 */
-		resolve(name: string, context: ChatVariableContext, token: CancellationToken): ProviderResult<ChatVariableValue[]>;
-	}
 }

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

@@ -0,0 +1,52 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+declare module 'vscode' {
+
+	export namespace chat {
+
+		/**
+		 * Register a variable which can be used in a chat request to any participant.
+		 * @param name The name of the variable, to be used in the chat input as `#name`.
+		 * @param description A description of the variable for the chat input suggest widget.
+		 * @param resolver Will be called to provide the chat variable's value when it is used.
+		 */
+		export function registerChatVariableResolver(name: string, description: string, resolver: ChatVariableResolver): Disposable;
+	}
+
+	export interface ChatVariableValue {
+		/**
+		 * The detail level of this chat variable value. If possible, variable resolvers should try to offer shorter values that will consume fewer tokens in an LLM prompt.
+		 */
+		level: ChatVariableLevel;
+
+		/**
+		 * The variable's value, which can be included in an LLM prompt as-is, or the chat participant may decide to read the value and do something else with it.
+		 */
+		value: string | Uri;
+
+		/**
+		 * A description of this value, which could be provided to the LLM as a hint.
+		 */
+		description?: string;
+	}
+
+	export interface ChatVariableContext {
+		/**
+		 * The message entered by the user, which includes this variable.
+		 */
+		prompt: string;
+	}
+
+	export interface ChatVariableResolver {
+		/**
+		 * A callback to resolve the value of a chat variable.
+		 * @param name The name of the variable.
+		 * @param context Contextual information about this chat request.
+		 * @param token A cancellation token.
+		 */
+		resolve(name: string, context: ChatVariableContext, token: CancellationToken): ProviderResult<ChatVariableValue[]>;
+	}
+}