import type { ActionResultStreamEvent } from "#protocol/message.js";
export declare const TASK_WAIT_TOOL_NAME = "eve__task_wait";
export declare const TASK_CANCEL_TOOL_NAME = "eve__task_cancel";
/** The task tools' names. */
export declare const TASK_TOOL_NAMES: readonly string[];
/**
 * Whether a tool call is the model managing its own tasks. The stream keeps
 * these calls so evals and traces can see them, but activity surfaces hide
 * them: people see the tasks, not the model waiting on or stopping them. The
 * `eve` namespace is reserved, so no authored tool matches.
 */
export declare function isTaskControlTool(toolName: string): boolean;
export declare const TOO_MANY_TASKS_CODE = "TOO_MANY_TASKS";
export declare const UNKNOWN_TASK_CODE = "UNKNOWN_TASK";
/**
 * Whether a tool result is the session refusing a task call for the model
 * to retry. Its message tells the model how to recover, so activity surfaces
 * keep it out of view. Only a failed result counts: an authored tool can
 * return the same `code` as ordinary output.
 */
export declare function isTaskRetryRefusal(event: ActionResultStreamEvent): boolean;