# Eino > Eino is a Go-based LLM application development framework by ByteDance. > It provides component abstractions, a graph/chain orchestration engine, > streaming primitives, a callback system, and an Agent Development Kit (ADK) > for building production-grade LLM applications. ## Repositories - [eino](https://github.com/cloudwego/eino) — core framework (this repo) - [eino-ext](https://github.com/cloudwego/eino-ext) — component integrations (OpenAI, Ark, Ollama, Redis, S3, …) - [eino-examples](https://github.com/cloudwego/eino-examples) — runnable example applications ## Overview & Background - [Overview](https://www.cloudwego.io/docs/eino/overview/) - [ByteDance Eino Practice](https://www.cloudwego.io/docs/eino/overview/bytedance_eino_practice/) - [Eino Open Source](https://www.cloudwego.io/docs/eino/overview/eino_open_source/) - [Graph or Agent — when to use which](https://www.cloudwego.io/docs/eino/overview/graph_or_agent/) ## Quick Start - [Simple LLM Application](https://www.cloudwego.io/docs/eino/quick_start/simple_llm_application/) - [Agent with Tools](https://www.cloudwego.io/docs/eino/quick_start/agent_llm_with_tools/) - [Eino Cookbook](https://www.cloudwego.io/docs/eino/eino-cookbook/) ## Core Concepts — Components Components are the typed building blocks of eino pipelines. Each has a defined interface in the core repo; implementations live in eino-ext. - [Components overview](https://www.cloudwego.io/docs/eino/core_modules/components/) - [ChatModel](https://www.cloudwego.io/docs/eino/core_modules/components/chat_model_guide/) - [ChatTemplate](https://www.cloudwego.io/docs/eino/core_modules/components/chat_template_guide/) - [ToolsNode](https://www.cloudwego.io/docs/eino/core_modules/components/tools_node_guide/) - [How to create a Tool](https://www.cloudwego.io/docs/eino/core_modules/components/tools_node_guide/how_to_create_a_tool/) - [Retriever](https://www.cloudwego.io/docs/eino/core_modules/components/retriever_guide/) - [Indexer](https://www.cloudwego.io/docs/eino/core_modules/components/indexer_guide/) - [Embedding](https://www.cloudwego.io/docs/eino/core_modules/components/embedding_guide/) - [DocumentLoader](https://www.cloudwego.io/docs/eino/core_modules/components/document_loader_guide/) - [DocumentParser](https://www.cloudwego.io/docs/eino/core_modules/components/document_loader_guide/document_parser_interface_guide/) - [DocumentTransformer](https://www.cloudwego.io/docs/eino/core_modules/components/document_transformer_guide/) - [Lambda](https://www.cloudwego.io/docs/eino/core_modules/components/lambda_guide/) - [AgenticChatModel](https://www.cloudwego.io/docs/eino/core_modules/components/agentic_chat_model_guide/) - [AgenticChatTemplate](https://www.cloudwego.io/docs/eino/core_modules/components/agentic_chat_template_guide/) - [AgenticToolsNode](https://www.cloudwego.io/docs/eino/core_modules/components/agentic_tools_node_guide/) ## Core Concepts — Orchestration The orchestration layer composes components into executable pipelines. Chain is a linear sequence; Graph is a DAG with conditional edges; Workflow is a higher-level structured abstraction over Graph. - [Chain & Graph introduction](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/chain_graph_introduction/) - [Orchestration design principles](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/orchestration_design_principles/) - [Workflow orchestration framework](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/workflow_orchestration_framework/) - [Stream programming essentials](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/stream_programming_essentials/) - [Callback system](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/callback_manual/) - [CallOption capabilities](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/call_option_capabilities/) - [Checkpoint & interrupt/resume](https://www.cloudwego.io/docs/eino/core_modules/chain_and_graph_orchestration/checkpoint_interrupt/) ## Core Concepts — Flow Integration - [ReAct agent](https://www.cloudwego.io/docs/eino/core_modules/flow_integration_components/react_agent_manual/) - [Multi-agent hosting](https://www.cloudwego.io/docs/eino/core_modules/flow_integration_components/multi_agent_hosting/) ## Agent Development Kit (ADK) The ADK provides a higher-level runtime for building, composing, and deploying agents. It sits above the Graph layer and introduces Agent, Skill, and Middleware abstractions. - [ADK overview](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/) - [Agent quickstart](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_quickstart/) - [Agent interface](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_interface/) - [Agent collaboration](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_collaboration/) - [Agent implementations](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_implementation/) - [ChatModel agent](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_implementation/chat_model/) - [Workflow agent](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_implementation/workflow/) - [Supervisor agent](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_implementation/supervisor/) - [Plan-and-execute agent](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_implementation/plan_execute/) - [Deep agents](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_implementation/deepagents/) - [Agent extension](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_extension/) - [Human-in-the-loop (HITL)](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/agent_hitl/) - [ADK callbacks](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/adk_agent_callback/) - [ChatModelAgent middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/) - [Filesystem middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_filesystem/) - [Skill middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_skill/) - [Summarization middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_summarization/) - [Plan-task middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_plantask/) - [Tool-search middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_toolsearch/) - [Tool-reduction middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_toolreduction/) - [Patch-toolcalls middleware](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_patchtoolcalls/) ## DevOps Tooling - [IDE plugin guide](https://www.cloudwego.io/docs/eino/core_modules/devops/ide_plugin_guide/) - [Visual orchestration plugin](https://www.cloudwego.io/docs/eino/core_modules/devops/visual_orchestration_plugin_guide/) - [Visual debug plugin](https://www.cloudwego.io/docs/eino/core_modules/devops/visual_debug_plugin_guide/) ## Ecosystem Integrations (eino-ext) - [ChatModel integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/chat_model/) - [Document integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/document/) - [Embedding integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/embedding/) - [Tool integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/tool/) - [Callback integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/callbacks/) - [Indexer integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/indexer/) - [Retriever integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/retriever/) - [ChatTemplate integrations](https://www.cloudwego.io/docs/eino/ecosystem_integration/chat_template/) ## Release Notes & Migration - [v0.1](https://www.cloudwego.io/docs/eino/release_notes_and_migration/v01_first_release/) - [v0.2](https://www.cloudwego.io/docs/eino/release_notes_and_migration/v02_second_release/) - [v0.3 — breaking changes](https://www.cloudwego.io/docs/eino/release_notes_and_migration/v03_tiny_break_change/) - [v0.4 — compose optimization](https://www.cloudwego.io/docs/eino/release_notes_and_migration/eino_v0.4._-compose_optimization/) - [v0.5 — ADK implementation](https://www.cloudwego.io/docs/eino/release_notes_and_migration/eino_v0.5._-adk_implementation/) - [v0.6 — JSON schema optimization](https://www.cloudwego.io/docs/eino/release_notes_and_migration/eino_v0.6._-jsonschema_optimization/) - [v0.7 — interrupt/resume refactor](https://www.cloudwego.io/docs/eino/release_notes_and_migration/eino_v0.7._-interrupt_resume_refactor/) - [v0.8 — ADK middlewares](https://www.cloudwego.io/docs/eino/release_notes_and_migration/eino_v0.8._-adk_middlewares/) ## FAQ - [FAQ](https://www.cloudwego.io/docs/eino/faq/)