langfuse

langfuse is a plugin for Claude Code from langfuse/skills. Its manifest loads nothing; the 3 skills it bundles cost 282 tokens per session together, scanned A, original, MIT.

A plugin for Langfuse, an open-source platform for observing and evaluating applications that use language models. It covers tracing model interactions, managing prompts, and running evaluations.

In plain words
What is it for?
Use it to trace model requests, manage reusable prompts, and evaluate language-model application outputs.
Why use it?
It helps teams inspect how language-model applications behave and organize the prompts and tests used to improve them.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to trace model requests, manage reusable prompts, and evaluate language-model application outputs.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add langfuse/skills
/plugin install langfuse
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/langfuse/skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for langfuse

README.md
[![agentmods](https://agentmods.dev/badge/plugins/langfuse/skills/skills/github.svg)](https://agentmods.dev/plugins/langfuse/skills/skills)
Your own site
<a href="https://agentmods.dev/plugins/langfuse/skills/skills"><img src="https://agentmods.dev/badge/plugins/langfuse/skills/skills/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for langfuse

Your own site · 80×15
<a href="https://agentmods.dev/plugins/langfuse/skills/skills"><img src="https://agentmods.dev/badge/plugins/langfuse/skills/skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 3 skills cost 282 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

langfuse scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/plugin.json · 21 lines

What it actually says

{
  "name": "langfuse",
  "description": "Skills for working with Langfuse, the open-source LLM engineering platform for tracing, prompt management, and evaluation.",
  "version": "1.11.0",
  "author": {
    "name": "Langfuse",
    "email": "[email protected]"
  },
  "homepage": "https://langfuse.com",
  "repository": "https://github.com/langfuse/skills",
  "license": "MIT",
  "keywords": [
    "langfuse",
    "llm",
    "observability",
    "tracing",
    "prompt-management",
    "evaluation"
  ]
}
Contents

What it installs

The manifest is a name and a version. 3 skills travel with it, and installing the plugin installs all of them — 282 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago Changed 3984bd35fd75
  2. 27d ago Changed 3997ce20c868
  3. 28d ago Changed 26c1c7079679
  4. 1mo ago Changed a4f6a884c681
  5. 1mo ago Changed cad6baa2d2a7
  6. 1mo ago Changed 7f5e6297a5d9
  7. 1mo ago Changed e64e197899d4
  8. 1mo ago Changed 7067818e43e7
  9. 1mo ago First seen · 21 lines scan A 7345e58b645d

Subscribe to this mod's changes

langfuse is a plugin published in the GitHub repository langfuse/skills (319 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.