import type { AgentConfig } from '../types/agentConfig.js';
import type { ChannelDriver } from '../types/channel.js';
import type { RunContext } from '../types/run-context.js';
import type { PersistedFlowPark, RunState } from '../runtime/durable/types.js';
import type { NormalizedTransition } from './normalizeTransition.js';
import { selectHostTarget } from '../runtime/select.js';
export declare const MAX_FLOW_PARK_DEPTH = 8;
/** Runaway nested flow entry. The structural twin of `FlowOscillationError`, and degraded
 *  the same way — a bounded limit the framework absorbs, not a crash the caller handles. */
export declare class FlowParkOverflowError extends Error {
    constructor(depth: number);
}
export type FlowPark = PersistedFlowPark;
export declare function pushFlowPark(run: RunState, park: FlowPark): void;
export declare function popFlowPark(run: RunState): FlowPark | undefined;
export declare function getFlowPark(run: RunState): FlowPark | undefined;
export declare function looksLikeOffScriptQuestion(input: string): boolean;
export interface CollectDigressionOptions {
    agent: AgentConfig;
    node: {
        id: string;
    };
    activeFlowName: string;
    run: RunState;
    driver: ChannelDriver;
    ctx: RunContext;
    select?: typeof selectHostTarget;
}
export type CollectDigressionResult = {
    kind: 'transition';
    transition: NormalizedTransition;
} | {
    kind: 'answeredThenResume';
} | {
    kind: 'none';
};
export declare function runCollectDigression(options: CollectDigressionOptions): Promise<CollectDigressionResult>;