/** Coalesce composite reads without occupying a transport scheduler permit. */
export declare class SharedReadGroup<T> {
    private readonly flights;
    private readonly active;
    run(key: string, operation: (signal: AbortSignal, isCurrent: () => boolean) => Promise<T>, signal?: AbortSignal): Promise<T>;
    /** Existing readers may finish, but an invalidated flight cannot publish or accept new readers. */
    invalidate(matches: (key: string) => boolean): void;
    clear(): void;
}
//# sourceMappingURL=shared-read-group.d.ts.map