export declare class MigrationUtility {
    private taskRepository;
    constructor();
    /**
     * Check if migration is needed (old JSON files exist)
     */
    isMigrationNeeded(): Promise<boolean>;
    /**
     * Perform complete migration from JSON files to SQLite
     */
    performMigration(): Promise<{
        success: boolean;
        migratedRequests: number;
        migratedTasks: number;
        migratedArchivedTasks: number;
        errors: string[];
    }>;
    /**
     * Migrate active tasks from JSON file to SQLite
     */
    private _migrateActiveTasks;
    /**
     * Migrate completed/archived tasks from JSON file to SQLite
     */
    private _migrateCompletedTasks;
    /**
     * Migrate a single task to the database
     */
    private _migrateTask;
    /**
     * Migrate a single archived task to the database
     */
    private _migrateArchivedTask;
    /**
     * Backup original JSON files
     */
    private _backupOriginalFiles;
    /**
     * Clean up original JSON files after successful migration
     */
    cleanupOriginalFiles(): Promise<void>;
    /**
     * Get migration status
     */
    getMigrationStatus(): Promise<{
        hasOldFiles: boolean;
        hasSqliteDatabase: boolean;
        needsMigration: boolean;
    }>;
}
/**
 * Standalone migration function that can be called from command line
 */
export declare function runMigration(): Promise<void>;