/**
 * ChatGPT — "Sign in with ChatGPT" OAuth (Authorization Code + PKCE).
 *
 * The headless half of the flow: drives the loopback authorization-code
 * exchange and returns a persistence-agnostic {@link OAuthLoginOutcome}, so
 * both WebUI servers can sign in over a WebSocket with no terminal IO.
 *
 * The wire protocol itself (client id, endpoints, request bodies, response
 * validation) lives in `./codex-protocol.js` and model discovery in
 * `./codex-models.js` — shared with the CLI terminal flow and the runtime
 * provider's refresh path, which used to keep their own copies.
 */
import type { BeginOAuthDeps, OAuthSession } from './types.js';
export { buildCodexAuthorizeUrl, CODEX_BASE_URL, CODEX_PROVIDER_ID } from './codex-protocol.js';
export { filterCurrentCodexModelIds } from './codex-models.js';
export declare function beginChatGPTLogin(deps: BeginOAuthDeps | undefined, signal?: AbortSignal): Promise<OAuthSession>;
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