langfuse

name

langfuse

description

Interact with Langfuse and access its documentation. Use when needing to (1) query or modify Langfuse data programmatically via the CLI — traces, prompts, datasets, scores, sessions, and any other API resource, (2) look up Langfuse documentation, concepts, integration guides, or SDK usage, or (3) understand how any Langfuse feature works. This skill covers CLI-based API access (via npx) and multiple documentation retrieval methods.

Langfuse

This skill helps you use Langfuse effectively across all common workflows: instrumenting applications, migrating prompts, debugging traces, and accessing data programmatically.

Core Principles

Follow these principles for ALL Langfuse work:

1. Documentation First: NEVER implement based on memory. Always fetch current docs before writing code (Langfuse updates frequently) See the section below on how to access documentation.
2. CLI for Data Access: Use langfuse-cli when querying/modifying Langfuse data. See the section below on how to use the CLI.
3. Best Practices by Use Case: Check the relevant reference file below for use-case-specific guidelines before implementing
4. Use latest Langfuse versions: Unless the user specified otherwise or there's a good reason, always use the latest version of Langfuse SDKs/APIs.

Use case specific references

• instrumenting an existing function/application: references/instrumentation.md
• migrating prompts from a codebase into Langfuse: references/prompt-migration.md
• capturing user feedback (thumbs, ratings, implicit signals) as scores on traces: references/user-feedback.md
• further tips on using the Langfuse CLI: references/cli.md
• upgrading or migrating Langfuse SDKs to the latest version: references/sdk-upgrade.md
• submitting feedback about this skill: references/skill-feedback.md

1. Langfuse API via CLI

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