/**
 * http-fetch-adapter.ts, a pure adapter turning a standard WHATWG `fetch` into the
 * connector's injected HttpFetch boundary. This module references only the global
 * fetch/Response (no node:*), so it stays within the calendar module's purity
 * contract; the actual `fetch` used is supplied by the caller (the agent passes the
 * runtime fetch, tests pass a fake server's fetch).
 */
import type { HttpFetch } from './oauth-types.js';
type FetchLike = (url: string, init?: {
    method?: string;
    headers?: Record<string, string>;
    body?: string;
}) => Promise<{
    status: number;
    ok: boolean;
    headers: {
        get(name: string): string | null;
    };
    json(): Promise<unknown>;
    text(): Promise<string>;
}>;
/** Wrap a WHATWG-style fetch into an HttpFetch. Defaults to the global fetch. */
export declare function fetchAdapter(fetchImpl?: FetchLike): HttpFetch;
export {};
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