import type { TaskState, PendingQuestion } from '../task/task-state.js';
import type { WireState } from '../task/wire-state-mapper.js';
/**
 * Response shape for `tasks/get` — a single task's status snapshot.
 */
export interface TasksGetResponse {
    taskId: string;
    status: WireState;
    pollFrequency: number;
    keepAlive?: number;
    metadata?: {
        pendingQuestion?: PendingQuestion;
    };
    error?: string;
}
/**
 * List item shape for `tasks/list` — lightweight summary per task.
 */
export interface TasksListItem {
    taskId: string;
    status: WireState;
    pollFrequency: number;
    createdAt: string;
    lastUpdatedAt: string;
}
/**
 * Returns the recommended poll interval in milliseconds based on task status.
 *
 * - WAITING_ANSWER → 2 000 ms  (client should check frequently for input-required)
 * - PENDING, RUNNING → 5 000 ms
 * - All others (WAITING, RATE_LIMITED, terminal) → 30 000 ms
 */
export declare function computePollFrequency(task: TaskState): number;
/**
 * Builds a SEP-1686 `tasks/get` response from internal TaskState.
 *
 * - Maps internal status to wire state via `mapToWireState`
 * - Computes poll frequency via `computePollFrequency`
 * - Includes `keepAlive` from task if present
 * - Includes first pending question in metadata when status is
 *   WAITING_ANSWER and the queue is non-empty
 * - Includes error string if present
 */
export declare function buildTasksGetResponse(task: TaskState): TasksGetResponse;
/**
 * Builds a SEP-1686 `tasks/list` response.
 *
 * - Filters by wire status if `statusFilter` is provided
 * - Sorts by `createdAt` descending (newest first)
 * - Paginates with page size 50; cursor is a string-encoded start index
 * - Returns `nextCursor` if more pages exist
 */
export declare function buildTasksListResponse(tasks: TaskState[], cursor?: string, statusFilter?: WireState): {
    tasks: TasksListItem[];
    nextCursor?: string;
};