Disable get_task_output and run_task tools when no tasks are available in workspace (microsoft#261677)

Author: Copilot

src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts

@@ -48,7 +48,7 @@ import { ITerminalGroupService, ITerminalService } from '../../terminal/browser/
 import { ITerminalProfileResolverService } from '../../terminal/common/terminal.js';
 
 import { ConfiguringTask, ContributedTask, CustomTask, ExecutionEngine, InMemoryTask, ITaskEvent, ITaskIdentifier, ITaskSet, JsonSchemaVersion, KeyedTaskIdentifier, RuntimeType, Task, TASK_RUNNING_STATE, TaskDefinition, TaskGroup, TaskRunSource, TaskSettingId, TaskSorter, TaskSourceKind, TasksSchemaProperties, USER_TASKS_GROUP_KEY, TaskEventKind, InstancePolicy, RerunAllRunningTasksCommandId } from '../common/tasks.js';
-import { CustomExecutionSupportedContext, ICustomizationProperties, IProblemMatcherRunOptions, ITaskFilter, ITaskProvider, ITaskService, IWorkspaceFolderTaskResult, ProcessExecutionSupportedContext, ServerlessWebContext, ShellExecutionSupportedContext, TaskCommandsRegistered, TaskExecutionSupportedContext } from '../common/taskService.js';
+import { CustomExecutionSupportedContext, ICustomizationProperties, IProblemMatcherRunOptions, ITaskFilter, ITaskProvider, ITaskService, IWorkspaceFolderTaskResult, ProcessExecutionSupportedContext, ServerlessWebContext, ShellExecutionSupportedContext, TaskCommandsRegistered, TaskExecutionSupportedContext, TasksAvailableContext } from '../common/taskService.js';
 import { ITaskExecuteResult, ITaskResolver, ITaskSummary, ITaskSystem, ITaskSystemInfo, ITaskTerminateResponse, TaskError, TaskErrors, TaskExecuteKind, Triggers, VerifiedTask } from '../common/taskSystem.js';
 import { getTemplates as getTaskTemplates } from '../common/taskTemplates.js';
 
@@ -231,6 +231,7 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 	private _persistentTasks: LRUCache<string, string> | undefined;
 
 	protected _taskRunningState: IContextKey<boolean>;
+	protected _tasksAvailableState: IContextKey<boolean>;
 
 	protected _outputChannel: IOutputChannel;
 	protected readonly _onDidStateChange: Emitter<ITaskEvent>;
@@ -347,6 +348,7 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 
 		}));
 		this._taskRunningState = TASK_RUNNING_STATE.bindTo(_contextKeyService);
+		this._tasksAvailableState = TasksAvailableContext.bindTo(_contextKeyService);
 		this._onDidStateChange = this._register(new Emitter());
 		this._registerCommands().then(() => TaskCommandsRegistered.bindTo(this._contextKeyService).set(true));
 		ServerlessWebContext.bindTo(this._contextKeyService).set(Platform.isWeb && !remoteAgentService.getConnection()?.remoteAuthority);
@@ -2467,6 +2469,14 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 		if (userTasks) {
 			result.set(USER_TASKS_GROUP_KEY, userTasks);
 		}
+
+		// Update tasks available context key
+		const hasAnyTasks = Array.from(result.values()).some(folderResult =>
+			(folderResult.set?.tasks && folderResult.set.tasks.length > 0) ||
+			(folderResult.configurations?.byIdentifier && Object.keys(folderResult.configurations.byIdentifier).length > 0)
+		);
+		this._tasksAvailableState.set(hasAnyTasks);
+
 		return result;
 	}
 

src/vs/workbench/contrib/tasks/common/taskService.ts

@@ -20,6 +20,7 @@ export const ShellExecutionSupportedContext = new RawContextKey<boolean>('shellE
 export const TaskCommandsRegistered = new RawContextKey<boolean>('taskCommandsRegistered', false, nls.localize('tasks.taskCommandsRegistered', "Whether the task commands have been registered yet"));
 export const ProcessExecutionSupportedContext = new RawContextKey<boolean>('processExecutionSupported', false, nls.localize('tasks.processExecutionSupported', "Whether ProcessExecution tasks are supported. Consider using in the when clause of a \'taskDefinition\' contribution."));
 export const ServerlessWebContext = new RawContextKey<boolean>('serverlessWebContext', false, nls.localize('tasks.serverlessWebContext', "True when in the web with no remote authority."));
+export const TasksAvailableContext = new RawContextKey<boolean>('tasksAvailable', false, nls.localize('tasks.tasksAvailable', "Whether any tasks are available in the workspace."));
 export const TaskExecutionSupportedContext = ContextKeyExpr.or(ContextKeyExpr.and(ShellExecutionSupportedContext, ProcessExecutionSupportedContext), CustomExecutionSupportedContext);
 
 export const ITaskService = createDecorator<ITaskService>('taskService');

src/vs/workbench/contrib/terminalContrib/chatAgentTools/browser/terminal.chatAgentTools.contribution.ts

@@ -82,7 +82,7 @@ class ChatAgentToolsContribution extends Disposable implements IWorkbenchContrib
 		this._register(toolsService.registerToolImplementation(CreateAndRunTaskToolData.id, createAndRunTaskTool));
 
 		const runTasksToolSet = this._register(toolsService.createToolSet(ToolDataSource.Internal, 'runTasks', 'runTasks', {
-			description: localize('toolset.runTasks', 'Runs tasks and gets their output for your workspace')
+			description: localize('toolset.runTasks', 'Runs tasks and gets their output for your workspace'),
 		}));
 		runTasksToolSet.addTool(RunTaskToolData);
 		runTasksToolSet.addTool(GetTaskOutputToolData);

src/vs/workbench/contrib/terminalContrib/chatAgentTools/browser/tools/task/getTaskOutputTool.ts

@@ -12,7 +12,7 @@ import { IMarkerService } from '../../../../../../../platform/markers/common/mar
 import { IChatService } from '../../../../../chat/common/chatService.js';
 import { ILanguageModelsService } from '../../../../../chat/common/languageModels.js';
 import { ToolDataSource, type CountTokensCallback, type IPreparedToolInvocation, type IToolData, type IToolImpl, type IToolInvocation, type IToolInvocationPreparationContext, type IToolResult, type ToolProgress } from '../../../../../chat/common/languageModelToolsService.js';
-import { ITaskService } from '../../../../../tasks/common/taskService.js';
+import { ITaskService, TasksAvailableContext } from '../../../../../tasks/common/taskService.js';
 import { ITerminalService } from '../../../../../terminal/browser/terminal.js';
 import { collectTerminalResults, getTaskDefinition, getTaskForTool, resolveDependencyTasks } from '../../taskHelpers.js';
 
@@ -22,6 +22,7 @@ export const GetTaskOutputToolData: IToolData = {
 	displayName: localize('getTaskOutputTool.displayName', 'Get Task Output'),
 	modelDescription: 'Get the output of a task',
 	source: ToolDataSource.Internal,
+	when: TasksAvailableContext,
 	inputSchema: {
 		type: 'object',
 		properties: {

src/vs/workbench/contrib/terminalContrib/chatAgentTools/browser/tools/task/runTaskTool.ts

@@ -10,7 +10,7 @@ import { ITelemetryService } from '../../../../../../../platform/telemetry/commo
 import { IChatService } from '../../../../../chat/common/chatService.js';
 import { ILanguageModelsService } from '../../../../../chat/common/languageModels.js';
 import { CountTokensCallback, IPreparedToolInvocation, IToolData, IToolImpl, IToolInvocation, IToolInvocationPreparationContext, IToolResult, ToolDataSource, ToolProgress } from '../../../../../chat/common/languageModelToolsService.js';
-import { ITaskService, ITaskSummary, Task } from '../../../../../tasks/common/taskService.js';
+import { ITaskService, ITaskSummary, Task, TasksAvailableContext } from '../../../../../tasks/common/taskService.js';
 import { ITerminalService } from '../../../../../terminal/browser/terminal.js';
 import { collectTerminalResults, getTaskDefinition, getTaskForTool, resolveDependencyTasks } from '../../taskHelpers.js';
 import { MarkdownString } from '../../../../../../../base/common/htmlContent.js';
@@ -169,6 +169,7 @@ export const RunTaskToolData: IToolData = {
 	userDescription: localize('runInTerminalTool.userDescription', 'Tool for running tasks in the workspace'),
 	icon: Codicon.tools,
 	source: ToolDataSource.Internal,
+	when: TasksAvailableContext,
 	inputSchema: {
 		'type': 'object',
 		'properties': {