Eino Guide

This is your starting point when you're new to Eino or don't know which part of the framework you need. It covers the three main layers (components, compose orchestration, and the agent development kit) and routes you to the specialized skills when you have specific questions. The skill is basically a map: it explains what ChatModels, Tools, Retrievers, and other components do, when to use Graph versus Chain versus Workflow for building pipelines, and when to reach for ChatModelAgent or DeepAgent instead of wiring everything yourself. Use this when you need the big picture or you're deciding between approaches, then jump to the focused skills for implementation details.

skills.sh installs: 353
GitHub stars: 835
last updated: Aug 21, 2026

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Install

$ npx -y skills add cloudwego/eino-ext --skill eino-guide --agent claude-code

Installs into .claude/skills of the current project.

Files

Eino Framework Guide

Eino (pronounced "i know") is a Go framework for building LLM applications.

Core Concepts

Component

Standardized interfaces for AI capabilities. Each interface has multiple interchangeable implementations.

Component	What It Does	Key Interface
ChatModel	LLM inference (generate / stream)	`model.BaseChatModel`, `model.ToolCallingChatModel`
Tool	Functions the model can call	`tool.InvokableTool`, `tool.EnhancedInvokableTool`
Embedding	Text to vector	`embedding.Embedder`
Retriever	Vector/keyword search	`retriever.Retriever`
Indexer	Store documents with vectors	`indexer.Indexer`
ChatTemplate	Prompt formatting with variables	`prompt.ChatTemplate`
Document Loader/Transformer	Load and process documents	`document.Loader`, `document.Transformer`
Callback Handler	Observability and tracing	`callbacks.Handler`