import type { ReplyContext } from "../../shared/types.js";
export interface SlackMessageEventLike {
    channel: string;
    user?: string;
    ts?: string;
    thread_ts?: string;
    channel_type?: string;
}
export declare function deriveSessionKey(event: SlackMessageEventLike, prefix?: string): string;
export declare function buildReplyContext(event: SlackMessageEventLike): ReplyContext;
export declare function isOldSlackMessage(ts: string | undefined, bootTimeMs: number): boolean;
//# sourceMappingURL=threads.d.ts.map