import type { SourceService } from './source-service.js';
import { type ServiceRuntime } from './service.js';
/** Independent of text eligibility and AI word analysis; all message kinds count once. */
export declare class ConversationActivityService {
    private readonly runtime;
    private readonly sources;
    private epoch;
    private readonly unsubscribe;
    constructor(runtime: ServiceRuntime, sources: Pick<SourceService, 'openSourceRef'>);
    dispose(): void;
    private context;
    private request;
    read(input: unknown, signal?: AbortSignal): Promise<import("../conversation-activity.js").ConversationActivityState>;
    participants(input: unknown, signal?: AbortSignal): Promise<import("../conversation-word-frequency.js").ConversationWordParticipants>;
    messages(input: unknown, signal?: AbortSignal): Promise<import("../conversation-activity.js").ConversationActivityMessages>;
    source(input: unknown, signal?: AbortSignal): Promise<{
        messageUid: string;
        sendAtMillis: number;
        systemRef: string;
        recordOwnerUserId?: never;
    } | {
        messageUid: string;
        sendAtMillis: number;
        recordOwnerUserId: import("../record-owner-id.js").RecordOwnerId;
        systemRef?: never;
    }>;
}
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