/**
 * Qwen response → UsageInfo transformer.
 *
 * Pure function — no I/O, no side effects. Converts the raw DashScope
 * OpenAI-compatible chat completion shape into the canonical UsageInfo
 * record used throughout hazo_llm_api.
 */
import type { UsageInfo } from "../../pricing/types.js";
interface QwenResponseLike {
    choices?: Array<{
        finish_reason?: string;
    }>;
    usage?: {
        prompt_tokens?: number;
        completion_tokens?: number;
        total_tokens?: number;
    };
    model?: string;
}
export interface QwenUsageInputs {
    /** Raw DashScope / OpenAI-compatible response object. */
    raw: QwenResponseLike;
    /** Model name to use when the response doesn't include one (e.g. image gen). */
    model_fallback: string;
    /** Wall-clock milliseconds from request start to response received. */
    latency_ms: number;
}
/**
 * Convert a raw Qwen API response into a UsageInfo record.
 *
 * Token counts default to 0 when absent (image generation calls return no
 * usage block). Call compute_cost() on the result to populate cost_usd.
 */
export declare function qwen_response_to_usage(inputs: QwenUsageInputs): UsageInfo;
export {};
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