Galileo TypeScript SDK

The Galileo TypeScript SDK (galileo) provides evaluation and observability workflows for GenAI applications in Node.js and TypeScript. It supports logging LLM calls, retriever operations, tool invocations, and multi-step workflows with built-in scoring.

Additional references:

• Framework Integrations — Vercel AI SDK, Mastra, LangGraph (JS), and more
• Guardrail Metrics Reference — Scoring metrics available for evaluation workflows
• Advanced Evaluation Patterns — Complex workflow evaluation and experiment design

Installation

npm install galileo

Or with yarn/pnpm: