@posthog/ai/dist/langchain/index.d.ts

PostHog Node.js AI integrations

import { PostHog } from 'posthog-node';
import { BaseCallbackHandler } from '@langchain/core/callbacks/base';
import { Serialized } from '@langchain/core/load/serializable';
import { ChainValues } from '@langchain/core/utils/types';
import { LLMResult } from '@langchain/core/outputs';
import { AgentAction, AgentFinish } from '@langchain/core/agents';
import { DocumentInterface } from '@langchain/core/documents';
import { BaseMessage } from '@langchain/core/messages';

declare class LangChainCallbackHandler extends BaseCallbackHandler {
    name: string;
    private client;
    private distinctId?;
    private traceId?;
    private properties;
    private privacyMode;
    private groups;
    private debug;
    private runs;
    private parentTree;
    constructor(options: {
        client: PostHog;
        distinctId?: string | number;
        traceId?: string | number;
        properties?: Record<string, any>;
        privacyMode?: boolean;
        groups?: Record<string, any>;
        debug?: boolean;
    });
    handleChainStart(chain: Serialized, inputs: ChainValues, runId: string, parentRunId?: string, tags?: string[], metadata?: Record<string, unknown>, runType?: string, runName?: string): void;
    handleChainEnd(outputs: ChainValues, runId: string, parentRunId?: string, tags?: string[], kwargs?: {
        inputs?: Record<string, unknown>;
    }): void;
    handleChainError(error: Error, runId: string, parentRunId?: string, tags?: string[], kwargs?: {
        inputs?: Record<string, unknown>;
    }): void;
    handleChatModelStart(serialized: Serialized, messages: BaseMessage[][], runId: string, parentRunId?: string, extraParams?: Record<string, unknown>, tags?: string[], metadata?: Record<string, unknown>, runName?: string): void;
    handleLLMStart(serialized: Serialized, prompts: string[], runId: string, parentRunId?: string, extraParams?: Record<string, unknown>, tags?: string[], metadata?: Record<string, unknown>, runName?: string): void;
    handleLLMEnd(output: LLMResult, runId: string, parentRunId?: string, tags?: string[], extraParams?: Record<string, unknown>): void;
    handleLLMError(err: Error, runId: string, parentRunId?: string, tags?: string[], extraParams?: Record<string, unknown>): void;
    handleToolStart(tool: Serialized, input: string, runId: string, parentRunId?: string, tags?: string[], metadata?: Record<string, unknown>, runName?: string): void;
    handleToolEnd(output: any, runId: string, parentRunId?: string, tags?: string[]): void;
    handleToolError(err: Error, runId: string, parentRunId?: string, tags?: string[]): void;
    handleRetrieverStart(retriever: Serialized, query: string, runId: string, parentRunId?: string, tags?: string[], metadata?: Record<string, unknown>, name?: string): void;
    handleRetrieverEnd(documents: DocumentInterface[], runId: string, parentRunId?: string, tags?: string[]): void;
    handleRetrieverError(err: Error, runId: string, parentRunId?: string, tags?: string[]): void;
    handleAgentAction(action: AgentAction, runId: string, parentRunId?: string, tags?: string[]): void;
    handleAgentEnd(action: AgentFinish, runId: string, parentRunId?: string, tags?: string[]): void;
    private _setParentOfRun;
    private _popParentOfRun;
    private _findRootRun;
    private _setTraceOrSpanMetadata;
    private _setLLMMetadata;
    private _popRunMetadata;
    private _getTraceId;
    private _getParentRunId;
    private _popRunAndCaptureTraceOrSpan;
    private _captureTraceOrSpan;
    private _popRunAndCaptureGeneration;
    private _captureGeneration;
    private _logDebugEvent;
    private _getLangchainRunName;
    private _convertLcToolCallsToOai;
    private _extractRawResponse;
    private _convertMessageToDict;
    private _parseUsageModel;
    private parseUsage;
}

export { LangChainCallbackHandler };