import { ProxyAgent } from 'undici';
/**
 * Resolves outbound proxy URL for ElevenLabs HTTPS calls.
 * Order: `ELEVENLABS_HTTPS_PROXY`, then `HTTPS_PROXY` / `https_proxy`, then `HTTP_PROXY` / `http_proxy`.
 * Node's global `fetch` does not read these; the plugin passes a Undici `ProxyAgent` when any is set.
 */
export declare function resolveElevenLabsProxyUrl(): string | undefined;
export declare function isElevenLabsProxyConfigured(): boolean;
/** Reused across requests; recreated if the resolved proxy URL changes. */
export declare function getElevenLabsProxyAgent(): ProxyAgent | undefined;
/**
 * Close and forget the cached `ProxyAgent`. Called from the plugin `destroy()`
 * hook so hot reloads / shutdowns do not leak undici sockets, and re-exported
 * under a `*ForTesting` alias for vitest cases that toggle proxy env vars.
 */
export declare function disposeElevenLabsProxyAgent(): void;
export declare const resetElevenLabsProxyAgentForTesting: typeof disposeElevenLabsProxyAgent;