import type { LLMMessage } from "./llm.js";
export type ApiFormat = "anthropic" | "openai";
export interface AnthropicRequestBody {
    model: string;
    max_tokens: number;
    system: string;
    messages: LLMMessage[];
    stream?: boolean;
}
export interface OpenAIRequestBody {
    model: string;
    max_tokens: number;
    messages: {
        role: "system" | "user" | "assistant";
        content: string;
    }[];
    stream?: boolean;
}
export interface AnthropicResponseShape {
    content: {
        type: string;
        text?: string;
    }[];
    usage?: {
        input_tokens: number;
        output_tokens: number;
    };
}
export interface OpenAIResponseShape {
    choices: {
        message?: {
            content?: string;
        };
        delta?: {
            content?: string;
        };
    }[];
    usage?: {
        prompt_tokens?: number;
        completion_tokens?: number;
        input_tokens?: number;
        output_tokens?: number;
    };
}
export declare function detectApiFormat(baseUrl: string): ApiFormat;
export declare function toOpenAIRequest(body: AnthropicRequestBody): OpenAIRequestBody;
export declare function fromOpenAIResponse(json: OpenAIResponseShape): AnthropicResponseShape;
export declare function authHeadersFor(format: ApiFormat, apiKey: string): Record<string, string>;
export declare function pathFor(format: ApiFormat): string;
export declare function openaiSSEToAnthropic(json: OpenAIStreamEvent): AnthropicSSEEvent | null;
export interface OpenAIStreamEvent {
    choices?: {
        delta?: {
            content?: string;
        };
    }[];
    usage?: {
        prompt_tokens?: number;
        completion_tokens?: number;
        input_tokens?: number;
        output_tokens?: number;
    };
}
export interface AnthropicSSEEvent {
    type: string;
    delta?: {
        type?: string;
        text?: string;
    };
    usage?: {
        input_tokens?: number;
        output_tokens?: number;
    };
    message?: {
        usage?: {
            input_tokens?: number;
            output_tokens?: number;
        };
    };
}
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