import type { BaseNodeConfig, WorkflowContext, WorkflowDefinition, WorkflowNode } from "../types.js";
/** Options accepted by sub workflow. */
export interface SubWorkflowOptions extends BaseNodeConfig {
    workflow: WorkflowDefinition;
    input?: unknown | ((context: WorkflowContext) => unknown);
    output?: (result: unknown) => unknown;
}
/** Create a sub-workflow node for nested execution. */
export declare function subWorkflow(id: string, options: SubWorkflowOptions): WorkflowNode;
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