import type { ActivityStatus, ActivityStep, BlockCarrier, MessageActivity } from './message-blocks';
export declare const STEP_ID: {
    readonly NODE_PREFIX: "node:";
    readonly TOOL_PREFIX: "tool:";
    readonly AGENT_PREFIX: "agent:";
    readonly NEXT_AGENT: "agent:next";
    readonly PENDING: "pending";
    readonly OCCURRENCE_SEPARATOR: "#";
};
export declare const NODE_STEP_STATUS: Record<string, ActivityStatus>;
export type FlowNodeEvent = {
    nodeId?: string;
    nodeLabel?: string;
    status?: string;
};
export declare function upsertNodeActivityStep<T extends BlockCarrier>(message: T, node: FlowNodeEvent | null | undefined): T;
export declare function countNodeOccurrences(steps: ActivityStep[] | undefined): Map<string, number>;
export declare function resolveMessageActivity(message: (BlockCarrier & {
    agentReasoning?: unknown;
}) | null | undefined): MessageActivity | undefined;
export declare const hasMessageActivity: (message: (BlockCarrier & {
    agentReasoning?: unknown;
}) | null | undefined) => boolean;