import type { Activity } from '../../shared/activity.js';
import type { AgentMessageRecord } from '../../shared/messages.js';
import type { InboxItem } from '../../shared/inbox.js';
export declare function messageFromInboxItem(item: InboxItem): AgentMessageRecord | undefined;
export declare function messageFromActivity(activity: Activity): AgentMessageRecord | undefined;
export declare function messageIdForInboxItem(item: InboxItem): string;
export declare function messageIdForActivity(activity: Activity): string;
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