/**
 * Shared implementation for providers that expose BOTH an OpenAI-compatible
 * and an Anthropic-compatible API surface against the same model catalog
 * (currently Kimi Code and Synthetic).
 *
 * Each call site supplies the provider-specific bits (base URLs, default
 * format, optional extra headers); the streaming/forwarding plumbing lives
 * here once.
 */
import type { Context, Model, SimpleStreamOptions } from "../types";
import { AssistantMessageEventStream } from "../utils/event-stream";
export type OpenAIAnthropicApiFormat = "openai" | "anthropic";
export interface OpenAIAnthropicShimOptions extends SimpleStreamOptions {
    /** API format: "openai" or "anthropic". */
    format?: OpenAIAnthropicApiFormat;
}
export interface OpenAIAnthropicShimConfig {
    /** Base URL for the Anthropic-compatible endpoint (without trailing /v1/messages). */
    anthropicBaseUrl: string;
    /** Optional override for the OpenAI-compatible base URL. If omitted, `model.baseUrl` is used as-is. */
    openaiBaseUrl?: string;
    /** Default API format when caller does not specify one. */
    defaultFormat: OpenAIAnthropicApiFormat;
    /** Provider-specific headers (e.g. auth/session) merged ahead of user-supplied headers. */
    extraHeaders?: () => Record<string, string>;
}
/**
 * Stream from an OpenAI-or-Anthropic compatible provider. Returns synchronously;
 * async header fetching and stream piping happen internally.
 */
export declare function streamOpenAIAnthropicShim(model: Model<"openai-completions">, context: Context, options: OpenAIAnthropicShimOptions | undefined, config: OpenAIAnthropicShimConfig): AssistantMessageEventStream;