import type { RuntimeUsage } from "../../../src/provider/shared/index.js";
type OpenAIResponsesStreamContext = {
    providerKind?: "openai" | "mistral" | "moonshotai";
    providerLabel?: string;
    webSearchToolName?: string;
    preserveRawOutputItems?: boolean;
};
export declare const MAX_OPENAI_STREAM_MESSAGE_SNAPSHOT_BYTES: number;
export declare const MAX_OPENAI_RESPONSES_RAW_METADATA_BYTES: number;
export declare const MAX_OPENAI_RESPONSES_STREAM_OUTPUT_ITEMS = 4096;
export declare const MAX_OPENAI_RESPONSES_STREAM_CONTENT_PARTS = 4096;
/**
 * The Responses API uses `input_tokens` / `output_tokens` field names
 * instead of Chat Completions' `prompt_tokens` / `completion_tokens`.
 */
export declare function extractOpenAIResponsesUsage(payload: unknown): RuntimeUsage | undefined;
export declare function normalizeOpenAIResponsesFinishReason(raw: unknown): string | {
    unified: string;
    raw: string;
} | null;
/**
 * Parse the Responses API streaming event grammar into the same UI part
 * shapes the existing OpenAI / Anthropic / Google streams emit.
 */
export declare function streamOpenAIResponsesParts(stream: ReadableStream<Uint8Array>, context?: OpenAIResponsesStreamContext): AsyncIterable<unknown>;
export {};
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