Скачать или смотреть Langfuse TypeScript SDK v4 (GA): OTel-native tracing, improved DX, performance, and integrations.

The Langfuse TypeScript SDK v4 is now GA. It’s rebuilt on OpenTelemetry JS v2 with modular packages and first-class auto-instrumentation, so you get robust context propagation, cleaner APIs, and out-of-the-box tracing for OpenAI, LangChain, and Vercel AI SDK.

What’s new:
OpenTelemetry-native design with solid context propagation
Modular packages: @langfuse/core, @langfuse/client, @langfuse/tracing, @langfuse/otel
Drop-in observability for OpenAI, LangChain, and Vercel AI SDK
Smoother prompts, datasets, and scoring APIs
Clear upgrade path from v3 → v4

00:00 Introduction
00:49 Challenges Faced by JS and TS Users
01:36 Introducing the New TypeScript SDK v4
01:48 Context Manager and Observation Methods
03:15 Demo Project Overview
03:44 Code Walkthrough and Example Execution
06:44 Conclusion and Future Prospects

Changelog: https://langfuse.com/changelog/2025-0...
v4 Overview: https://langfuse.com/docs/observabili...
Setup guide: https://langfuse.com/docs/observabili...
Upgrade v3 → v4: https://langfuse.com/docs/observabili...