/**
 * Creates a fetch wrapper that enforces a maximum response body size.
 *
 * Guards against memory exhaustion from oversized OIDC discovery documents,
 * JWKS responses, token endpoint payloads, or other HTTP responses.
 *
 * Two-layer protection:
 * 1. Fast path: rejects immediately if Content-Length header exceeds the limit
 * 2. Streaming guard: wraps the response body to enforce the limit during
 *    chunked transfer-encoding where Content-Length is absent
 *
 * @param baseFetch - The underlying fetch implementation to wrap
 * @param maxBodySize - Maximum allowed response body size in bytes
 * @returns A fetch function that enforces the size limit
 *
 * @internal
 */
export declare function createSizeLimitedFetch(baseFetch: typeof fetch, maxBodySize: number): typeof fetch;