/**
 * Parse an SSE ReadableStream from the /responses endpoint and re-emit it as
 * an SSE ReadableStream whose chunks are in Chat Completions format.
 *
 * The output format is identical to what /chat/completions?stream=true
 * produces: lines of `data: {...}\n\n` terminated by `data: [DONE]\n\n`.
 */
interface ChatCompletion {
    id: string;
    object: 'chat.completion';
    created: number;
    model: string;
    choices: Array<{
        index: number;
        message: {
            role: string;
            content: string | null;
            refusal: null;
        };
        finish_reason: string;
    }>;
    usage: {
        prompt_tokens: number;
        completion_tokens: number;
        total_tokens: number;
        cacheRead: number;
        cacheWrite: number;
    };
}
/**
 * Convert a /responses API response object into a /chat/completions response
 * object so callers can handle both with identical code.
 */
export declare function convertResponseToChatCompletion(response: any): ChatCompletion;
export declare function convertResponsesStreamToChatStream(responseStream: ReadableStream<Uint8Array>, model: string): ReadableStream<Uint8Array>;
export declare function sleep(ms: number): Promise<unknown>;
export declare function formatFileSize(bytes: number, decimalPoint?: number): string;
export declare function truncateString(str: string, num: number): string;
export declare function unEscapeHTML(text: string): string;
/**
 * Removes the $schema property from a JSON schema object.
 * This is useful when the schema needs to be stored in MongoDB or other systems
 * that don't support this metadata field.
 *
 * @param schema - The JSON schema object that may contain $schema property
 * @returns A new schema object without the $schema property
 */
export declare function removeSchemaMetadata(schema: any): any;
export {};