/**
 * Braintrust Exporter
 * Exports spans to Braintrust AI evaluation platform
 */
import type { BraintrustExporterConfig, ExporterHealthStatus, ExportResult, SpanData } from "../../types/index.js";
import { BaseExporter } from "./baseExporter.js";
/**
 * Braintrust exporter for AI evaluation and scoring
 * Supports project logs and evaluation metrics
 */
export declare class BraintrustExporter extends BaseExporter {
    private readonly apiKey;
    private readonly projectName;
    private readonly endpoint;
    constructor(config: BraintrustExporterConfig);
    initialize(): Promise<void>;
    exportSpan(span: SpanData): Promise<ExportResult>;
    exportBatch(spans: SpanData[]): Promise<ExportResult>;
    flush(): Promise<void>;
    shutdown(): Promise<void>;
    healthCheck(): Promise<ExporterHealthStatus>;
    /**
     * Verify connectivity to Braintrust API
     */
    protected ping(): Promise<void>;
    /**
     * Convert span to Braintrust log format
     */
    private convertToBraintrustLog;
}