import type { TurnProjection } from "../schemas/projection";
export interface LiveRevisionState {
    current: number;
    byTurnId: ReadonlyMap<string, number>;
}
/** Add an older authoritative slice without allowing it to roll back live content. */
export declare function prependOlder(current: TurnProjection[], page: TurnProjection[]): TurnProjection[];
/** Install a new authoritative window, retaining only live writes newer than the request. */
export declare function replaceWindow(current: TurnProjection[], page: TurnProjection[], liveRevisionAtStart: number, liveRevisions: LiveRevisionState): TurnProjection[];