/**
 * Blocked state handler for workflow execution
 *
 * Handles the case when an agent returns a blocked status,
 * requesting user input to continue.
 */
import type { WorkflowStep, AgentResponse } from '../../models/types.js';
import type { WorkflowEngineOptions } from '../types.js';
/**
 * Result of handling a blocked state.
 */
export type BlockedHandlerResult = {
    readonly kind: 'unavailable' | 'cancelled';
} | {
    readonly kind: 'continued';
    readonly userInput: string;
};
/**
 * Handle blocked status by requesting user input.
 *
 * @param step - The step that is blocked
 * @param response - The blocked response from the agent
 * @param options - Workflow engine options containing callbacks
 * @returns Result indicating whether to continue and any user input
 */
export declare function handleBlocked(step: WorkflowStep, response: AgentResponse, options: WorkflowEngineOptions): Promise<BlockedHandlerResult>;
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