Agent 365 Observability Extensions for LangChain (Node.js)

This package provides automatic instrumentation for LangChain.js Runnable invocations, emitting OpenTelemetry spans aligned with Agent 365 observability conventions.

Installation

pnpm add @microsoft/agents-a365-observability-extensions-langchain

Ensure you have configured the Agent 365 ObservabilityManager and an OpenTelemetry tracer provider.

Usage

Enable the instrumentation early in your application startup:

import { LangChainTraceInstrumentor } from '@microsoft/agents-a365-observability-extensions-langchain';
import * as LangChainCallbacks from "@langchain/core/callbacks/manager";
import { ObservabilityManager } from '@microsoft/agents-a365-observability';

// 1) Configure the tracing SDK
ObservabilityManager.start({
  serviceName: 'Your Service',
  serviceVersion: '1.0.0'
  // your exporter/provider configuration
});

// 2) set up langchain auto instrument
LangChainTraceInstrumentor.instrument(LangChainCallbacks as any);

// 3) Use LangChain; spans are created automatically for all Runnable operations
const result = await chain.invoke(input);