import { type ApiKeyAccount } from '@cortexkit/anthropic-auth-core';
import { type Api, type AssistantMessageEventStream, type Context, type Model, type SimpleStreamOptions } from '@earendil-works/pi-ai';
type AnthropicEvent = {
    type?: string;
    index?: number;
    content_block?: Record<string, unknown>;
    delta?: Record<string, unknown>;
    message?: {
        usage?: Record<string, number>;
    };
    usage?: Record<string, number>;
};
export declare function buildExplicitBaseMessagesUrl(baseURL: string): URL;
export declare function configureApiRouteHeaders(account: ApiKeyAccount, fastMode: boolean): Headers;
export declare function parseSse(response: Response): AsyncGenerator<AnthropicEvent>;
export declare function primaryResponseAllowsApiFallback(preflight: Response | string): boolean;
export declare function streamCortexKitAnthropic(model: Model<Api>, context: Context, options?: SimpleStreamOptions): AssistantMessageEventStream;
export {};