/**
 * Anthropic Messages codec. Pure request/response translation between the
 * Anthropic Messages wire and the gateway's OpenAI Chat Completions core.
 * Streaming translation lives in `anthropic-stream.ts`; HTTP handling lives
 * in `anthropic.ts`.
 */
import type { OpenAiChatResponse } from "../providers/protocol.js";
import type { AnthropicRequest } from "./anthropic-wire.js";
import type { ExecutedSearch, ServerToolLoopEvent } from "./server-tool-loop.js";
export type { AnthropicRequest } from "./anthropic-wire.js";
/**
 * Whether an Anthropic tool is *server-executed* (run by Anthropic's backend,
 * e.g. `web_search_20250305` / `code_execution_*`). Nothing behind this gateway
 * can execute those, so advertising them to the upstream model would only produce
 * calls nobody answers. Everything else — plain client tools (no `type` /
 * `custom`) and Anthropic-defined client tools (`bash_*`, `text_editor_*`,
 * `computer_*`), all of which the caller executes via ordinary `tool_use`
 * blocks — is projected through.
 */
export declare function isAnthropicServerTool(tool: {
    type?: string;
}): boolean;
/** A server web search tool declaration (`web_search_20250305` et al.) — the
 *  one server tool the gateway can honor via its own web-search executor. */
export declare function isAnthropicWebSearchTool(tool: {
    type?: string;
}): boolean;
/** The name the gateway-executed web search tool is projected under chat-side. */
export declare const WEB_SEARCH_TOOL_NAME = "web_search";
/** Options gating server-executed tool projection (on iff an executor exists). */
export type AnthropicTranslationOptions = {
    serverTools?: boolean;
};
type OpenAiResponse = OpenAiChatResponse;
export declare function thinkingValidationError(body: AnthropicRequest): string | undefined;
/**
 * Translate an Anthropic Messages request to an OpenAI Chat Completions body.
 * The upstream model is always the backend's own model (Claude Code sends a
 * `claude-*` id the local server would not recognise); the requested id is
 * only echoed back in the response.
 */
export declare function anthropicToChat(body: AnthropicRequest, backendModel: string | undefined, options?: AnthropicTranslationOptions): Record<string, unknown>;
export declare function mapStopReason(finishReason: string | null | undefined): string;
export declare function chatToAnthropicMessage(openai: OpenAiResponse, model: string, searches?: readonly ExecutedSearch[], events?: readonly ServerToolLoopEvent[]): Record<string, unknown>;
export declare function countTokensEstimate(body: AnthropicRequest): number;