import type { SignalLifecycleHook, SignalOptions } from "../../signals/types/index.js";
/**
 * Devtools writer for a single signal: pushes new values under its key and, via
 * {@link TDevtoolsStateUpdater.complete}, the disposal marker that drops the
 * entry from the tree.
 */
export type TDevtoolsStateUpdater<T> = ((newState: T, actionName?: string) => void) & {
    complete(): void;
};
export declare const Devtools: {
    createState<T>(initialValue: T, optionsDry?: SignalOptions<T> | string): TDevtoolsStateUpdater<T> | null;
    createSignalHooks<T>(initialValue: T, options?: SignalOptions<T>): SignalLifecycleHook<T> | null;
    readonly hasDevtools: boolean;
};