import type { ContentBlockParam } from '@anthropic-ai/sdk/resources';
import type { AuthMode } from './types.js';
export declare const EXTENDED_CACHE_TTL_BETA = "extended-cache-ttl-2025-04-11";
export declare const OAUTH_BETA_HEADER = "claude-code-20250219,oauth-2025-04-20,interleaved-thinking-2025-05-14,extended-cache-ttl-2025-04-11";
export declare const EFFORT_BETA_HEADER = "effort-2025-11-24";
export declare const CLI_USER_AGENT = "claude-cli/1.0.0 (external, cli)";
export declare const BILLING_HEADER_TEXT = "x-anthropic-billing-header: cc_version=1.0.0.test; cc_entrypoint=cli; cch=00000;";
export declare function detectAuthMode(token: string): AuthMode;
export declare function buildClientOptions(token: string, mode: AuthMode, baseUrl?: string, fetchImpl?: typeof fetch): ({
    authToken: string;
} | {
    apiKey: string;
}) & {
    baseURL?: string;
    fetch?: typeof fetch;
};
export declare function buildRequestHeaders(mode: AuthMode, sessionId: string, requestId: string, withEffort?: boolean, extendedCacheTtl?: boolean, withFast?: boolean): Record<string, string>;
export declare function buildSystemPrefix(mode: AuthMode): ContentBlockParam[] | null;