import type { ChannelDriver } from '../types/channel.js';
import type { Flow, FlowNode } from '../types/flow.js';
import type { RunContext } from '../types/run-context.js';
import type { RunState } from '../runtime/durable/types.js';
type DegradedFlowResult = {
    kind: 'ended';
    reason: string;
} | {
    kind: 'handoff';
    to: string;
    reason?: string;
};
export declare const SAFE_DEGRADED_MESSAGE = "I'm sorry \u2014 something went wrong on my side. Let me try to help you another way.";
export declare function findEscalateNode(registry: Map<string, FlowNode>): FlowNode | undefined;
export declare function appendSafeAssistantMessage(run: RunState, ctx: RunContext, text?: string): void;
export declare function degradeFlowError(flow: Flow, registry: Map<string, FlowNode>, run: RunState, driver: ChannelDriver, ctx: RunContext, dispatchNode: (node: FlowNode, run: RunState, driver: ChannelDriver, ctx: RunContext) => Promise<import('./normalizeTransition.js').NormalizedTransition>): Promise<DegradedFlowResult>;
export {};