import type { HappyAgentEvent } from "./protocol/events.js";
/** A bounded race window used to rebase snapshots loaded after the SSE stream opened. */
export declare class HappyReducerRecentEvents {
    #private;
    get epoch(): number;
    checkpoint(): number;
    remember(event: HappyAgentEvent, now: number): void;
    since(checkpoint: number, now: number): HappyAgentEvent[];
    isCompleteSince(epoch: number, startedAt: number, now: number): boolean;
    invalidate(): void;
}
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