# Langfuse Blog

The latest updates from Langfuse. See [Changelog](/content/changelog/index.html) for more product updates.

## Highlights

[engineering  
**Designing the runtime for Langfuse code evaluators**  
Code evaluators let you score traces with your own Python or TypeScript code. A look at the execution model behind them: the requirements, the options we rejected, and the security stance we adopted.  
4 Weeks Ago  
·  
Tobias](/content/blog/2026-06-22-code-evaluators-execution-model/index.html)  
[engineering  
**AI is eating the AI engineering loop**  
The full AI engineering loop can technically be automated now. But that doesn't mean it should. Here is what we think you should hand to agents, and what you should keep doing yourself.  
June 9, 2026  
·  
Lotte](/content/blog/2026-06-09-ai-is-eating-ai-engineering/index.html)  
[engineering  
**The Rage Clicks of LLM apps: High-Signal Production Monitoring for AI Customer Support Agents**  
How to use LLM-as-a-judge to detect when your users say "f**k".  
April 1, 2026  
·  
Annabell](/content/blog/2026-04-01-llm-as-a-judge-production-monitoring/index.html)

## All Posts

All [73]

[engineering  
**How we use agents to review production infrastructure**  
How repo-owned agent workflows help us review incidents, infra cost, security findings, and bugs in production.  
June 5, 2026  
·  
Max](/content/blog/2026-06-05-agentic-setup-for-operational-work/index.html)  
[update  
**Langfuse May Update**  
Code Evaluators, full-text search, Langfuse MCP, Experiments in CI/CD and more  
May 31, 2026  
·  
Marc](/content/blog/2026-05-31-langfuse-may-update/index.html)  
[update  
**Langfuse April Update**  
Japan Cloud Region, new Experiments, Langfuse Academy, LLM-as-a-Judge API and more  
April 30, 2026  
·  
Marc](/content/blog/2026-04-30-langfuse-april-update/index.html)  
[announcement  
**Langfuse Cloud 日本リージョンを開始しました**  
Langfuse Cloud 日本リージョンを公開しました。LLM のトレースや評価データを日本国内に保管したいチーム向けの専用クラウドリージョンです。  
April 27, 2026  
·  
Marc, Clemens, Max](/content/blog/2026-04-27-langfuse-cloud-japan-jp/index.html)  
[announcement  
**Langfuse Cloud Japan Region**  
Langfuse Cloud Japan is live. A dedicated cloud region hosted in Japan for teams that need their LLM observability data to stay in Japan.  
April 27, 2026  
·  
Marc, Clemens, Max](/content/blog/2026-04-27-langfuse-cloud-japan/index.html)  
[engineering  
**Classifying User Intent with Categorical LLM-as-a-Judge**  
A guide on how to set up a categorical LLM-as-a-judge evaluator to classify user intent. Follow along with how we applied this to our demo application.  
April 14, 2026  
·  
Lotte](/content/blog/2026-04-14-categorical-llm-as-a-judge-user-intent/index.html)  
[update  
**Langfuse March Update**  
Agent Skill, Langfuse CLI, boolean and categorical LLM-as-a-Judge scores, Kiro integration, and more  
March 31, 2026  
·  
Marc](/content/blog/2026-03-31-langfuse-march-update/index.html)  
[engineering  
**We Used Autoresearch on Our AI Skill, It Taught Us to Write Better Tests**  
We applied Karpathy's autoresearch to optimize our Langfuse prompt migration skill — and got a lesson in why the target function matters more than the optimizer.  
March 24, 2026  
·  
Lotte](/content/blog/2026-03-24-optimizing-ai-skill-with-autoresearch/index.html)  
[engineering  
**How We Built an Agent Skill to Synthesize what Langfuse Users want**  
We built an AI agent skill that synthesizes GitHub issues, support tickets, and meeting notes into a weekly digest, and used Langfuse to monitor and improve it.  
March 13, 2026  
·  
Lotte](/content/blog/2026-03-13-weekly-digest-ai-skill/index.html)  
[engineering, architecture  
**Simplifying Langfuse for Scale**  
A deep dive into how we moved Langfuse to an observations-first data model.  
March 10, 2026  
·  
Steffen, Valeriy, Max](/content/blog/2026-03-10-simplify-langfuse-for-scale/index.html)  
[update  
**Langfuse February Update**  
Observation-centric data model, faster UI, Observations API v2 and Metrics API v2 out of beta, faster evaluation workflows  
February 28, 2026  
·  
Marc](/content/blog/2026-02-28-langfuse-february-update/index.html)  
[engineering  
**Evaluating AI Agent Skills**  
How we used Langfuse datasets, tracing, and the cloud agent SDK to iteratively evaluate and improve our AI agent skill.  
February 26, 2026  
·  
Lotte](/content/blog/2026-02-26-evaluate-ai-agent-skills/index.html)  
[guide  
**Using Agent Skills to Automatically Improve your Prompts**  
Use the Langfuse skill for Claude Code to analyze trace feedback and iteratively improve your prompts.  
February 16, 2026  
·  
Lotte](/content/blog/2026-02-16-prompt-improvement-claude-skills/index.html)  
[engineering  
**Will you be my CLI? Making Agents fall in love with Langfuse.**  
How we optimized Langfuse for AI agents with CLI, Skills, markdown endpoints, public RAG endpoint, llms.txt, and MCP servers. A love letter to agents that need great developer tools.  
February 14, 2026  
·  
Felix, Lotte, Nimar, Marc](/content/blog/2026-02-13-will-you-be-my-cli/index.html)  
[update  
**Langfuse January Update**  
Langfuse joins ClickHouse, Claude Code integration, corrected outputs, Langfuse v4 Beta, and new integrations  
January 31, 2026  
·  
Marc](/content/blog/2026-01-31-langfuse-january-update/index.html)

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