langfuse observability — Agent Skill
by langfuse · Updated
Langfuse observability plugin for Claude Code — captures and exports traces, spans, and session telemetry from Claude Code to Langfuse for LLM monitoring, debugging, and evaluation
At a glance
langfuse-observability is an Agent Skill by langfuse in the Coding & Engineering category. In Claude Code it installs with `/plugin install langfuse-observability@claude-plugins-official` after adding the anthropics/claude-plugins-official marketplace; other assistants use its SKILL.md instructions as rules. Its source repository has 29 GitHub stars (as of Oct 28, 2026).
How to install langfuse observability in your AI client
Setup for Claude Code, Claude Desktop, Cursor, Codex, Windsurf, Cline and VS Code — copy-paste ready.
How to install langfuse observability in Claude CodeAnthropic's agentic CLI
Add the marketplace
claude/plugin marketplace add anthropics/claude-plugins-officialInstall the skill
claude/plugin install langfuse-observability@claude-plugins-officialUse it
These are slash commands for a Claude Code session, not your shell. Claude auto-invokes the skill when your request matches its description — or type its slash command if it exposes one.
How to install langfuse observability in Claude DesktopDesktop app (MCP config)
Clone the source
bashgit clone https://github.com/langfuse/claude-observability-plugin.gitAdd the SKILL.md to your Skills folder
Settings → Capabilities → Skills → add the folder containing SKILL.md. Claude picks it up automatically.
How to install langfuse observability in CursorAI-first code editor
Clone the source
bashgit clone https://github.com/langfuse/claude-observability-plugin.gitConvert to a Cursor rule
Create .cursor/rules/langfuse-observability.mdc and paste the SKILL.md body. Set `alwaysApply` or a glob so the Agent loads it in context.
How to install langfuse observability in Codex CLIOpenAI coding agent
Clone the source
bashgit clone https://github.com/langfuse/claude-observability-plugin.gitReference in AGENTS.md
Add the skill's instructions (or a link) to AGENTS.md at your repo root — Codex reads it on every run.
How to install langfuse observability in WindsurfCodeium's agentic IDE
Clone the source
bashgit clone https://github.com/langfuse/claude-observability-plugin.gitAdd to your rules / context
Paste the SKILL.md instructions into this tool's custom rules or workspace instructions so the agent follows them.
How to install langfuse observability in ClineVS Code autonomous agent
Clone the source
bashgit clone https://github.com/langfuse/claude-observability-plugin.gitAdd to your rules / context
Paste the SKILL.md instructions into this tool's custom rules or workspace instructions so the agent follows them.
How to install langfuse observability in VS CodeCopilot / MCP support
Clone the source
bashgit clone https://github.com/langfuse/claude-observability-plugin.gitAdd to your rules / context
Paste the SKILL.md instructions into this tool's custom rules or workspace instructions so the agent follows them.
Documentation
Full READMELangfuse Observability Plugin for Claude Code
Claude Code plugin that sends Claude Code session telemetry to Langfuse. It traces user prompts, agent turns, model generations with their token usage and cost, thinking blocks, tool calls, skills, subagents, and pasted or returned images.
Langfuse also documents this integration on the Claude Code integration page.
Quick Start
Add the marketplace and install the plugin:
claude plugin marketplace add langfuse/Claude-Observability-Plugin
claude plugin install langfuse-observability@langfuse-observabilityRestart Claude Code after installing, so that it loads the hook.
Tracing covers the claude CLI and the desktop app in Code mode. Claude Desktop Chat mode runs no Claude Code hooks and is not traced.
Prerequisites
The plugin needs uv on PATH. The hook runs as a uv script and installs the Langfuse SDK from its own inline script metadata. Machines without uv fall back to Python 3.10+ as python3 with langfuse>=4.7,<5 installed.
Without a usable runtime the hook writes the reason to its log and exits. It never blocks or slows Claude Code.
Langfuse Credentials
Configure the plugin from inside a Claude Code session. This is a Claude Code slash command, not a shell command:
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