/**
 * @file Langfuse Adapter
 * Integration with Langfuse for LLM observability
 */
import type { LangfuseAdapterConfig, LangfuseClient } from "../../types/index.js";
/**
 * Langfuse adapter for evaluation observability
 */
export declare class LangfuseAdapter {
    private _config;
    private _unsubscribers;
    private _traceIdMap;
    constructor(config: LangfuseAdapterConfig);
    /**
     * Start listening to evaluation events
     */
    start(): void;
    /**
     * Stop listening to events
     */
    stop(): void;
    /**
     * Send scorer score to Langfuse
     */
    private _sendScorerScore;
    /**
     * Send pipeline scores to Langfuse
     */
    private _sendPipelineScores;
    /**
     * Manually send a score to Langfuse
     */
    sendScore(name: string, value: number, options?: {
        traceId?: string;
        comment?: string;
        metadata?: Record<string, unknown>;
    }): Promise<void>;
    /**
     * Shutdown the adapter and flush any pending data
     */
    shutdown(): Promise<void>;
}
/**
 * Create a Langfuse adapter
 */
export declare function createLangfuseAdapter(config: LangfuseAdapterConfig): LangfuseAdapter;
/**
 * Create and start a Langfuse adapter
 */
export declare function startLangfuseAdapter(config: LangfuseAdapterConfig): LangfuseAdapter;
/**
 * Helper: Create a mock Langfuse client for testing
 */
export declare function createMockLangfuseClient(): LangfuseClient & {
    scores: Array<{
        name: string;
        value: number;
        traceId?: string;
        comment?: string;
        metadata?: Record<string, unknown>;
    }>;
};