use IPromptsService to provide customizations

extensions/copilot/src/extension/chatSessions/copilotcli/node/copilotCLISkills.ts

@@ -20,11 +20,12 @@ import {
 import { isObject } from '../../../../util/vs/base/common/types';
 import { URI } from '../../../../util/vs/base/common/uri';
 import { IInstantiationService } from '../../../../util/vs/platform/instantiation/common/instantiation';
-import { IChatPromptFileService } from '../../common/chatPromptFileService';
+import { IPromptsService } from '../../../../platform/promptFiles/common/promptsService';
+import { CancellationToken } from '../../../../util/vs/base/common/cancellation';
 
 export interface ICopilotCLISkills {
 	readonly _serviceBrand: undefined;
-	getSkillsLocations(): Uri[];
+	getSkillsLocations(token: CancellationToken): Promise<Uri[]>;
 }
 
 export const ICopilotCLISkills = createServiceIdentifier<ICopilotCLISkills>('ICopilotCLISkills');
@@ -37,12 +38,12 @@ export class CopilotCLISkills extends Disposable implements ICopilotCLISkills {
 		@IConfigurationService private readonly configurationService: IConfigurationService,
 		@INativeEnvService private readonly envService: INativeEnvService,
 		@IWorkspaceService private readonly workspaceService: IWorkspaceService,
-		@IChatPromptFileService private readonly chatPromptFileService: IChatPromptFileService,
+		@IPromptsService private readonly promptsService: IPromptsService,
 	) {
 		super();
 	}
 
-	public getSkillsLocations(): Uri[] {
+	public async getSkillsLocations(token: CancellationToken): Promise<Uri[]> {
 		// Get additional skill locations from config
 		const configSkillLocationUris = new ResourceSet();
 		const locations = this.configurationService.getNonExtensionConfig<Record<string, boolean>>(SKILLS_LOCATION_KEY);
@@ -68,7 +69,7 @@ export class CopilotCLISkills extends Disposable implements ICopilotCLISkills {
 				}
 			}
 		}
-		this.chatPromptFileService.skills
+		(await this.promptsService.getSkills(token))
 			.filter(s => s.uri.scheme === Schemas.file)
 			.map(s => s.uri)
 			.map(uri => dirname(dirname(uri)))

extensions/copilot/src/extension/chatSessions/copilotcli/node/copilotCli.ts

@@ -13,7 +13,7 @@ import { ConfigKey, IConfigurationService } from '../../../../platform/configura
 import { IEnvService } from '../../../../platform/env/common/envService';
 import { IVSCodeExtensionContext } from '../../../../platform/extContext/common/extensionContext';
 import { ILogService } from '../../../../platform/log/common/logService';
-import { type ParsedPromptFile } from '../../../../platform/promptFiles/common/promptsService';
+import { IPromptsService } from '../../../../platform/promptFiles/common/promptsService';
 import { IWorkspaceService } from '../../../../platform/workspace/common/workspaceService';
 import { createServiceIdentifier } from '../../../../util/common/services';
 import { Emitter, Event } from '../../../../util/vs/base/common/event';
@@ -22,10 +22,10 @@ import { Disposable } from '../../../../util/vs/base/common/lifecycle';
 import { basename } from '../../../../util/vs/base/common/resources';
 import { URI } from '../../../../util/vs/base/common/uri';
 import { IInstantiationService } from '../../../../util/vs/platform/instantiation/common/instantiation';
-import { IChatPromptFileService } from '../../common/chatPromptFileService';
 import { getCopilotLogger } from './logger';
 import { ensureNodePtyShim } from './nodePtyShim';
 import { ensureRipgrepShim } from './ripgrepShim';
+import { CancellationToken } from '../../../../util/vs/base/common/cancellation';
 
 export const COPILOT_CLI_REASONING_EFFORT_PROPERTY = 'reasoningEffort';
 const COPILOT_CLI_MODEL_MEMENTO_KEY = 'github.copilot.cli.sessionModel';
@@ -245,15 +245,15 @@ export class CopilotCLIAgents extends Disposable implements ICopilotCLIAgents {
 	private readonly _onDidChangeAgents = this._register(new Emitter<void>());
 	readonly onDidChangeAgents: Event<void> = this._onDidChangeAgents.event;
 	constructor(
-		@IChatPromptFileService private readonly chatPromptFileService: IChatPromptFileService,
+		@IPromptsService private readonly promptsService: IPromptsService,
 		@ICopilotCLISDK private readonly copilotCLISDK: ICopilotCLISDK,
 		@IVSCodeExtensionContext private readonly extensionContext: IVSCodeExtensionContext,
 		@ILogService private readonly logService: ILogService,
 		@IWorkspaceService private readonly workspaceService: IWorkspaceService,
 	) {
 		super();
 		void this.getAgents();
-		this._register(this.chatPromptFileService.onDidChangeCustomAgents(() => {
+		this._register(this.promptsService.onDidChangeCustomAgents(() => {
 			this._refreshAgents();
 		}));
 		this._register(this.workspaceService.onDidChangeWorkspaceFolders(() => {
@@ -302,7 +302,7 @@ export class CopilotCLIAgents extends Disposable implements ICopilotCLIAgents {
 	}
 
 	async resolveAgent(agentId: string): Promise<SweCustomAgent | undefined> {
-		for (const promptFile of this.chatPromptFileService.customAgentPromptFiles) {
+		for (const promptFile of await this.promptsService.getCustomAgents(CancellationToken.None)) {
 			if (agentId === promptFile.uri.toString()) {
 				return this.toCustomAgent(promptFile)?.agent;
 			}
@@ -334,7 +334,7 @@ export class CopilotCLIAgents extends Disposable implements ICopilotCLIAgents {
 				sourceUri: URI.from({ scheme: 'copilotcli', path: `/agents/${agent.name}` }),
 			});
 		}
-		for (const promptFile of this.chatPromptFileService.customAgentPromptFiles) {
+		for (const promptFile of await this.promptsService.getCustomAgents(CancellationToken.None)) {
 			// Skip legacy .chatmode.md files — they are a deprecated format
 			// and should not appear in the Copilot CLI agent list.
 			if (promptFile.uri.path.toLowerCase().endsWith('.chatmode.md')) {
@@ -362,28 +362,31 @@ export class CopilotCLIAgents extends Disposable implements ICopilotCLIAgents {
 		return agents.map(agent => this.cloneAgent(agent));
 	}
 
-	private toCustomAgent(promptFile: ParsedPromptFile): CLIAgentInfo | undefined {
-		const agentName = getAgentFileNameFromFilePath(promptFile.uri);
-		const headerName = promptFile.header?.name?.trim();
+	private toCustomAgent(customAgent: vscode.ChatCustomAgent): CLIAgentInfo | undefined {
+		const agentName = getAgentFileNameFromFilePath(customAgent.uri);
+		const headerName = customAgent.name;
 		const name = headerName === undefined || headerName === '' ? agentName : headerName;
 		if (!name) {
 			return undefined;
 		}
 
-		const tools = promptFile.header?.tools?.filter(tool => !!tool) ?? [];
-		const model = promptFile.header?.model?.[0];
+		const tools = customAgent.tools?.filter(tool => !!tool) ?? [];
+		const model = customAgent.model?.[0];
 
 		return {
 			agent: {
 				name,
 				displayName: name,
-				description: promptFile.header?.description ?? '',
+				description: customAgent.description ?? '',
 				tools: tools.length > 0 ? tools : null,
-				prompt: async () => promptFile.body?.getContent() ?? '',
-				disableModelInvocation: promptFile.header?.disableModelInvocation ?? false,
+				prompt: async () => {
+					const pf = await this.promptsService.parseFile(customAgent.uri, CancellationToken.None);
+					return pf.body?.getContent() ?? '';
+				},
+				disableModelInvocation: customAgent.disableModelInvocation ?? false,
 				...(model ? { model } : {}),
 			},
-			sourceUri: promptFile.uri,
+			sourceUri: customAgent.uri,
 		};
 	}
 

extensions/copilot/src/extension/chatSessions/copilotcli/node/copilotcliPromptResolver.ts

@@ -23,6 +23,7 @@ import { generateUserPrompt } from '../../../prompts/node/agent/copilotCLIPrompt
 import { getWorkingDirectory, isIsolationEnabled, IWorkspaceInfo } from '../../common/workspaceInfo';
 import { ICopilotCLIImageSupport, isImageMimeType } from './copilotCLIImageSupport';
 import { ICopilotCLISkills } from './copilotCLISkills';
+import { CancellationToken } from '../../../../util/vs/base/common/cancellation';
 import { IVSCodeExtensionContext } from '../../../../platform/extContext/common/extensionContext';
 
 export class CopilotCLIPromptResolver {
@@ -77,7 +78,7 @@ export class CopilotCLIPromptResolver {
 		const isolationEnabled = isIsolationEnabled(workspaceInfo) || additionalWorkspaces.some(ws => isIsolationEnabled(ws));
 		const folderToWorktreeMap = this.buildFolderToWorktreeMap(workspaceInfo, additionalWorkspaces);
 		const hasAnyWorkingDirectory = getWorkingDirectory(workspaceInfo) || additionalWorkspaces.some(ws => getWorkingDirectory(ws));
-		const knownSkillLocations = this.skillsService.getSkillsLocations();
+		const knownSkillLocations = await this.skillsService.getSkillsLocations(CancellationToken.None);
 		await Promise.all(Array.from(variables).map(async variable => {
 			// Unsupported references: prompt instructions, instruction files, and the customizations index.
 			if (isInstructionFile(variable) || isCustomizationsIndex(variable)) {

extensions/copilot/src/extension/chatSessions/copilotcli/node/copilotcliSessionService.ts

@@ -9,7 +9,7 @@ import { createReadStream } from 'node:fs';
 import * as fs from 'node:fs/promises';
 import { devNull, EOL } from 'node:os';
 import { createInterface } from 'node:readline';
-import type { ChatRequest, ChatSessionItem } from 'vscode';
+import type { ChatCustomAgent, ChatRequest, ChatSessionItem } from 'vscode';
 import { IChatDebugFileLoggerService } from '../../../../platform/chat/common/chatDebugFileLoggerService';
 import { ConfigKey, IConfigurationService } from '../../../../platform/configuration/common/configurationService';
 import { INativeEnvService } from '../../../../platform/env/common/envService';
@@ -19,7 +19,7 @@ import { RelativePattern } from '../../../../platform/filesystem/common/fileType
 import { ILogService } from '../../../../platform/log/common/logService';
 import { deriveCopilotCliOTelEnv } from '../../../../platform/otel/common/agentOTelEnv';
 import { IOTelService } from '../../../../platform/otel/common/otelService';
-import { ParsedPromptFile } from '../../../../platform/promptFiles/common/promptsService';
+import { IPromptsService } from '../../../../platform/promptFiles/common/promptsService';
 import { IWorkspaceService } from '../../../../platform/workspace/common/workspaceService';
 import { createServiceIdentifier } from '../../../../util/common/services';
 import { coalesce } from '../../../../util/vs/base/common/arrays';
@@ -36,7 +36,6 @@ import { IInstantiationService } from '../../../../util/vs/platform/instantiatio
 import { ChatRequestTurn2, ChatResponseTurn2, ChatSessionStatus, Uri } from '../../../../vscodeTypes';
 import { IPromptVariablesService } from '../../../prompt/node/promptVariablesService';
 import { IAgentSessionsWorkspace } from '../../common/agentSessionsWorkspace';
-import { IChatPromptFileService } from '../../common/chatPromptFileService';
 import { IChatSessionMetadataStore, RequestDetails, StoredModeInstructions } from '../../common/chatSessionMetadataStore';
 import { IChatSessionWorkspaceFolderService } from '../../common/chatSessionWorkspaceFolderService';
 import { IChatSessionWorktreeService } from '../../common/chatSessionWorktreeService';
@@ -171,7 +170,7 @@ export class CopilotCLISessionService extends Disposable implements ICopilotCLIS
 		@IOTelService private readonly _otelService: IOTelService,
 		@IPromptVariablesService private readonly _promptVariablesService: IPromptVariablesService,
 		@IChatDebugFileLoggerService private readonly _debugFileLogger: IChatDebugFileLoggerService,
-		@IChatPromptFileService private readonly _chatPromptFileService: IChatPromptFileService,
+		@IPromptsService private readonly _promptsService: IPromptsService,
 	) {
 		super();
 		this.monitorSessionFiles();
@@ -654,7 +653,7 @@ export class CopilotCLISessionService extends Disposable implements ICopilotCLIS
 	protected async createSessionsOptions(options: ICreateSessionOptions & { mcpServers?: SessionOptions['mcpServers'] }): Promise<Readonly<SessionOptions>> {
 		const [agentInfos, skillLocations] = await Promise.all([
 			this.agents.getAgents(),
-			this.copilotCLISkills.getSkillsLocations(),
+			this.copilotCLISkills.getSkillsLocations(CancellationToken.None),
 		]);
 		const customAgents = agentInfos.map(i => i.agent);
 		const variablesContext = this._promptVariablesService.buildTemplateVariablesContext(options.sessionId, options.debugTargetSessionIds);
@@ -798,14 +797,14 @@ export class CopilotCLISessionService extends Disposable implements ICopilotCLIS
 		const [agentId, storedDetails] = await Promise.all([agentIdPromise, requestDetailsPromise]);
 
 		// Build lookup from copilotRequestId → RequestDetails for the callback
-		const customAgentLookup = this.createCustomAgentLookup();
+		const customAgentLookup = await this.createCustomAgentLookup();
 		const legacyMappings: RequestDetails[] = [];
 		const detailsByCopilotId = new Map<string, RequestIdDetails>();
-		const defaultModeInstructions = agentId ? this.resolveAgentModeInstructions(agentId, customAgentLookup) : undefined;
+		const defaultModeInstructions = agentId ? await this.resolveAgentModeInstructions(agentId, customAgentLookup) : undefined;
 
 		for (const d of storedDetails) {
 			if (d.copilotRequestId) {
-				const modeInstructions = d.modeInstructions ?? this.resolveAgentModeInstructions(d.agentId, customAgentLookup) ?? defaultModeInstructions;
+				const modeInstructions = d.modeInstructions ?? await this.resolveAgentModeInstructions(d.agentId, customAgentLookup) ?? defaultModeInstructions;
 				detailsByCopilotId.set(d.copilotRequestId, { requestId: d.vscodeRequestId, toolIdEditMap: d.toolIdEditMap, modeInstructions });
 			}
 		}
@@ -838,36 +837,38 @@ export class CopilotCLISessionService extends Disposable implements ICopilotCLIS
 		return { history, events };
 	}
 
-	private createCustomAgentLookup(): Map<string, ParsedPromptFile> {
-		const agents = this._chatPromptFileService.customAgentPromptFiles;
-		const lookup = new Map<string, ParsedPromptFile>();
+	private async createCustomAgentLookup(): Promise<Map<string, [ChatCustomAgent, Lazy<Promise<string>>]>> {
+		const agents = await this._promptsService.getCustomAgents(CancellationToken.None);
+		const lookup = new Map<string, [ChatCustomAgent, Lazy<Promise<string>>]>();
 		for (const agent of agents) {
+			const lazyContent = new Lazy(() => this._promptsService.parseFile(agent.uri, CancellationToken.None).then(parsed => parsed.body?.getContent() ?? ''));
 			const keys = [
-				agent.header?.name?.trim(),
+				agent.name?.trim(),
 				agent.uri.toString(),
 				getAgentFileNameFromFilePath(agent.uri),
 			];
 			for (const key of keys) {
 				if (key && !lookup.has(key)) {
-					lookup.set(key, agent);
+					lookup.set(key, [agent, lazyContent]);
 				}
 			}
 		}
 		return lookup;
 	}
 
-	private resolveAgentModeInstructions(agentId: string | undefined, customAgentLookup: Map<string, ParsedPromptFile>): StoredModeInstructions | undefined {
+	private async resolveAgentModeInstructions(agentId: string | undefined, customAgentLookup: Map<string, [ChatCustomAgent, Lazy<Promise<string>>]>): Promise<StoredModeInstructions | undefined> {
 		if (!agentId) {
 			return undefined;
 		}
-		const agent = customAgentLookup.get(agentId);
-		if (!agent) {
+		const agentEntry = customAgentLookup.get(agentId);
+		if (!agentEntry) {
 			return undefined;
 		}
+		const [agent, lazyContent] = agentEntry;
 		return {
 			uri: agent.uri.toString(),
-			name: agent.header?.name?.trim() || agentId,
-			content: agent.body?.getContent() ?? '',
+			name: agent.name?.trim() || agentId,
+			content: await lazyContent.value,
 		};
 	}