/**
 * Claude — "Sign in with Claude" OAuth (Authorization Code + PKCE), Claude
 * Pro/Max subscription login. Headless port of the CLI's `anthropic-oauth.ts`.
 *
 * Anthropic quirks: authorize at claude.ai/oauth/authorize (`code=true`), the
 * OAuth `state` IS the PKCE verifier, JSON token exchange at
 * platform.claude.com/v1/oauth/token, loopback callback on :53692/callback.
 */
import type { BeginOAuthDeps, OAuthSession } from './types.js';
export declare const CLAUDE_PROVIDER_ID = "anthropic-oauth";
/** Build the Claude authorize URL. Anthropic uses the PKCE verifier as `state`. */
export declare function buildClaudeAuthorizeUrl(challenge: string, verifier: string): string;
export declare function beginClaudeLogin(_deps: BeginOAuthDeps | undefined, signal?: AbortSignal): Promise<OAuthSession>;
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