---
title: "Langfuse"
description: "1 posts about Langfuse, summarised, each linking to the original."
---

# Langfuse
> 1 posts about Langfuse, summarised, each linking to the original.

## Articles

### [Trace and evaluate Cursor agents with Langfuse, powered by ClickHouse](https://yomu.fyi/post/trace-and-evaluate-cursor-agents-with-langfuse-powered-by-clickhouse.md)
- Company: [Clickhouse](https://yomu.fyi/company/clickhouse.md)
- Published: Oct 22, 2026
- Type: Tutorial

Langfuse is an open-source platform whose Observability plugin captures Cursor agent traces, including model calls, tool executions, and token usage, with each prompt creating a “Cursor Turn”. ClickHouse powers Langfuse v4 analytics with a wide observations table storing user, session, tags, and environment, avoiding joins for team-wide cost and latency aggregations. To set up, create a Langfuse project, install the plugin from the Cursor Marketplace, place API keys in a config file, and restart Cursor. Each trace contains LLM observations with conversation history, tool observations for Shell, Read, and MCP actions, nested subagent observations, and context compaction events, all grouped into sessions. Teams use dashboards to find expensive turns, create project rules, build datasets from real sessions, and apply evaluators (LLM-as-a-judge, human review) to compare cost and completion before deploying, with CI via a GitHub Action.