/**
 * PostHog Exporter
 * Exports spans to PostHog product analytics platform
 * @see https://posthog.com/docs/api
 */
import type { ExporterHealthStatus, ExportResult, PostHogExporterConfig, SpanData } from "../../types/index.js";
import { BaseExporter } from "./baseExporter.js";
/**
 * PostHog exporter for product analytics and LLM event tracking
 * Supports capturing LLM interactions as events with properties
 */
export declare class PostHogExporter extends BaseExporter {
    private readonly apiKey;
    private readonly host;
    private readonly personalApiKey?;
    constructor(config: PostHogExporterConfig);
    initialize(): Promise<void>;
    /**
     * Get authorization headers
     */
    private getHeaders;
    exportSpan(span: SpanData): Promise<ExportResult>;
    exportBatch(spans: SpanData[]): Promise<ExportResult>;
    flush(): Promise<void>;
    shutdown(): Promise<void>;
    healthCheck(): Promise<ExporterHealthStatus>;
    /**
     * Verify connectivity to PostHog API
     */
    protected ping(): Promise<void>;
    /**
     * Convert span to PostHog event format
     */
    private convertToPostHogEvent;
    /**
     * Get event name based on span type
     */
    private getEventName;
    /**
     * Convert span status to string
     */
    private getStatusString;
    /**
     * Extract custom properties from span attributes
     * Filters out standard attributes that are already handled
     */
    private extractCustomProperties;
}