import type { LanguageModel } from 'ai';
import type { Flow, FlowNode } from '../types/flow.js';
import type { RunState } from '../runtime/durable/types.js';
import type { StreamPart } from '../types/stream.js';
export interface ReduceTransitionInput {
    fromNodeId: string;
    toNode: FlowNode;
    run: RunState;
    flow: Flow;
    model: LanguageModel;
    data?: Record<string, unknown>;
    emit: (part: StreamPart) => void;
    abortSignal?: AbortSignal;
}
export declare function reduceTransition(input: ReduceTransitionInput): Promise<void>;