/**
 * Task Loader Service - Centralized task loading logic
 *
 * REFACTORED: Extracted from TaskManager.loadTaskForStateUpdate() for Phase 3.
 * Handles loading tasks from queue (preferred) or file (fallback).
 * Includes retry logic for timing issues.
 *
 * @internal
 * @requirement REFACTOR-EXTRACT-ORCHESTRATION-SERVICES - Phase 3: Extract orchestration services
 */
import { type WorkflowState } from '@shadel/workflow-core';
import { TaskQueueManager } from './task-queue.js';
/**
 * Task loading result
 */
export interface TaskLoadResult {
    activeQueueTask: any;
    fileTaskData: any;
    validationData: any;
    currentState: WorkflowState;
    taskId: string;
    taskData: any;
}
/**
 * Task Loader Service
 *
 * Centralizes task loading logic with retry and fallback mechanisms.
 */
export declare class TaskLoaderService {
    private queueManager;
    private taskFile;
    constructor(queueManager: TaskQueueManager, taskFile: string);
    /**
     * Load task data for state update operation
     *
     * Handles loading task from queue (preferred) or file (fallback).
     * Includes retry logic for timing issues.
     *
     * @returns Object containing activeQueueTask, fileTaskData, validationData, currentState, taskId, taskData
     * @throws Error if no active task found
     */
    loadTaskForStateUpdate(): Promise<TaskLoadResult>;
}