import type { JSONRPCMessage } from "@modelcontextprotocol/sdk/types.js";
import type { EventStore, EventId, StreamId } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
export declare class InMemoryEventStore implements EventStore {
    private streams;
    storeEvent(streamId: StreamId, message: JSONRPCMessage): Promise<EventId>;
    replayEventsAfter(lastEventId: EventId, { send }: {
        send: (eventId: EventId, message: JSONRPCMessage) => Promise<void>;
    }): Promise<StreamId>;
    /** Drop streams idle past the TTL so abandoned sessions don't leak memory. */
    private reapStale;
}