import type { MisinaHooks, MisinaOptions } from "./types.mjs";
/**
* Wrap a value to signal "replace, don't merge" during deep merge in
* `.extend()`. Useful when defaults' hooks/headers/searchParams should be
* overridden rather than concatenated.
*/
export declare function replaceOption<T>(value: T): T;
/**
* Deep-merge two MisinaOptions. Hooks arrays concat. Headers shallow-merge
* (b wins). Other primitives → b wins. `replaceOption(value)` forces replace.
*/
export declare function mergeOptions(a: MisinaOptions, b: MisinaOptions): MisinaOptions;
export declare function mergeHookConfigs(a: MisinaHooks | undefined, b: MisinaHooks | undefined): MisinaHooks;