import type { SlackAccessor } from '../../accessor/slack.ts';
export declare const VIRTUAL_ROOTS: readonly ["channels", "dms", "users"];
export declare function latestMessageTs(accessor: SlackAccessor, channelId: string): Promise<number | null>;
/**
 * The channel's day directories, newest first.
 *
 * A day dir is real for any date the channel has existed for, so the bare
 * listing is a window: the last `maxDays` up to the newest message. A glob
 * names its own window instead, and then the cap does not apply, because the
 * span is already bounded by what was typed.
 */
export declare function dateRange(latestTs: number, created: number, maxDays?: number, span?: readonly [string, string] | null): string[];
export declare const readdir: import("../hierarchy/probe.ts").ReaddirFn<SlackAccessor>;
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