export declare function mergeHeaders(input: RequestInfo | URL, init?: RequestInit): Headers;
/**
 * API-key mode: we keep x-api-key untouched (SDK already populated it from
 * the `apiKey` option) and only *add* the identity headers Claude Code CLI
 * normally sends.
 */
export declare function setApiKeyHeaders(headers: Headers): Headers;
export declare function resolveBaseUrl(): URL | null;
export declare function isInsecure(): boolean;
export declare function rewriteUrl(input: RequestInfo | URL): {
    input: RequestInfo | URL;
    url: URL | null;
};
type AnyRecord = Record<string, unknown>;
export declare function isRecord(value: unknown): value is AnyRecord;
export declare function prefixToolNamesInPlace(parsed: AnyRecord): void;
/**
 * The Anthropic streaming response echoes tool names in SSE events. If we
 * prefixed outgoing names we must strip the prefix back out so opencode's
 * tool dispatcher can find the original tool definition.
 */
export declare function stripToolPrefix(text: string): string;
export declare function rewriteRequestBody(body: string, sessionID: string): string;
export declare function createStrippedStream(response: Response): Response;
export {};