langfuse-js

Modular mono repo for the Langfuse JS/TS client libraries.

Packages

Package	NPM	Description	Environments
@langfuse/client		Langfuse API client for universal JavaScript environments	Universal JS
@langfuse/tracing		Langfuse instrumentation methods based on OpenTelemetry	Node.js 20+
@langfuse/otel		Langfuse OpenTelemetry export helpers	Node.js 20+
@langfuse/openai		Langfuse integration for OpenAI SDK	Universal JS
@langfuse/langchain		Langfuse integration for LangChain	Universal JS

Documentation

• Docs
• Reference

Development

This is a monorepo managed with pnpm. See CONTRIBUTING.md for detailed development instructions.

Quick start:

pnpm install    # Install dependencies
pnpm build      # Build all packages
pnpm test       # Run tests
pnpm ci         # Run full CI suite
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License

MIT