import type { ArkmeTimelineItem } from '../types.js';
import { type ArkmeUnifiedTimelineWindow } from '../unified-chat-timeline.js';
/** Revocations apply to visible canonical rows as well as the uncommitted tail. */
export declare function removeUnifiedTimelineItems(window: ArkmeUnifiedTimelineWindow, keys: ReadonlySet<string>): ArkmeUnifiedTimelineWindow;
/** Mounted-conversation overlay, never a durable window or a pagination owner. */
export declare class UnifiedTimelineLiveTail {
    private revision;
    private readonly pending;
    get readRevision(): number;
    get hasPending(): boolean;
    receive(window: ArkmeUnifiedTimelineWindow, items: readonly ArkmeTimelineItem[]): ArkmeUnifiedTimelineWindow;
    /** Request order is not coverage: a completed read may still lag a delivered body. */
    reconcile(window: ArkmeUnifiedTimelineWindow, readRevision: number): ArkmeUnifiedTimelineWindow;
    remove(keys: ReadonlySet<string>): void;
    private project;
}
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