LangChain / LangGraph

LangChain 与 LangGraph 框架:链式编排、LCEL、状态图 Agent、LangSmith 可观测的端到端实战。

全部教程

LangChain / LangGraph

LangChain 与 LangGraph 框架:链式编排、LCEL、状态图 Agent、LangSmith 可观测的端到端实战。

本主题共 96 篇教程

高级

LangGraph Tutorial: Build Stateful AI Agents with Persistent Memory

Build complex multi-step AI workflows with state management using LangGraph

高级

Build a Production RAG System with LlamaIndex and Pinecone

Step-by-step guide to retrieval-augmented generation that works on real data

高级

CrewAI vs AutoGen vs LangGraph: Multi-Agent Framework 2026

Build production multi-agent systems with the right framework

高级

LangChain vs LlamaIndex vs Haystack: RAG Framework 2026

Choose the right RAG framework for production LLM applications

高级

Python AI Development Stack 2026: FastAPI + LangChain + Supabase

Build production-ready AI applications with the modern Python AI stack

高级

LlamaIndex Tutorial 2026: Build Production RAG Applications

Connect LLMs to your documents with LlamaIndex ingestion pipelines and query engines

高级

LangGraph Complete Guide 2026: Build Stateful AI Agents

Build agents with cycles, memory, human-in-the-loop using LangGraph

进阶

CrewAI Tutorial 2026: Build Multi-Agent Systems That Work Together

Create coordinated AI agent teams with CrewAI to tackle complex tasks—research, analysis, content creation—that single agents cannot handle alone

进阶

LangChain vs LlamaIndex 2026: Which Framework Should You Use for RAG?

An honest technical comparison of LangChain and LlamaIndex for building RAG applications, with benchmarks, use cases, and migration guide

进阶

LangChain vs LlamaIndex: Which Framework to Choose in 2025?

In-depth comparison of the two leading LLM frameworks

入门

RAG Architecture Cheat Sheet

RAG pipeline components, patterns, and configuration reference

进阶

AI Observability: Tracing and Monitoring LLM Applications

Debug, optimize, and monitor production AI systems

高级

AI Agent Memory Systems: Short-Term and Long-Term Memory

Build AI agents that remember and learn from interactions

高级

Building Production RAG Systems with LangChain: From Prototype to 99.9% Uptime

Engineering teams share battle-tested patterns for reliable retrieval-augmented generation in production

入门

LangChain Quick Reference

LangChain LCEL patterns, chains, and agents cheat sheet

高级

Building Research Assistant Agent with AI Agents: Complete Guide 2026

Create autonomous search the web and synthesize research on any topic using LLM agents

高级

Corrective RAG: Implementation Guide with Weaviate 2026

Build a self-correcting retrieval with quality assessment RAG system from scratch

进阶

Chunking Strategies: Advanced RAG Tutorial

Optimal text chunking strategies for different document types

进阶

LangSmith vs Helicone vs Langfuse: Side-by-Side Comparison

LLM observability platform comparison — comparing monitoring across langsmith and langfuse

高级

Multi-Tool Agent Pipeline: Complete Tutorial

Chaining multiple tools in a sequential agent workflow

高级

Building Code Review Agent with AI Agents: Complete Guide 2026

Create autonomous automatically review pull requests for bugs and quality using LLM agents

进阶

AI Summarization Pipeline

Summarizing long documents efficiently with map-reduce — hands-on project tutorial

高级

Building Financial Analysis Agent with AI Agents: Complete Guide 2026

Create autonomous analyze financial data and generate investment reports using LLM agents

高级

Multi-Vector RAG: Implementation Guide with Weaviate 2026

Build a storing multiple embedding types per document RAG system from scratch

进阶

Parent Document Retrieval: Advanced RAG Tutorial

Hierarchical chunking with parent-child document strategy

进阶

Multi-Query Retrieval: Advanced RAG Tutorial

Generating multiple queries for comprehensive RAG retrieval

进阶

RAG (Retrieval Augmented Generation): Complete Developer Guide 2026

Master RAG (Retrieval Augmented Generation) with practical examples and production patterns

高级

Building Bug Fix Agent with AI Agents: Complete Guide 2026

Create autonomous identify and fix bugs in codebases autonomously using LLM agents

进阶

LangChain Expression Language (LCEL): Tutorial and Best Practices

Build production AI with LangChain — composable chain building

进阶

RAG Fusion: Advanced RAG Tutorial

Combining results from multiple retrieval strategies

进阶

LangGraph for Stateful Agents: Tutorial and Best Practices

Build production AI with LangGraph — stateful agent graphs with cycles

高级

RAPTOR RAG: Implementation Guide with Pinecone 2026

Build a hierarchical document summarization for better context RAG system from scratch

高级

Multi-Agent Systems with CrewAI: Complete Developer Guide 2026

Master Multi-Agent Systems with CrewAI with practical examples and production patterns

进阶

n8n + LangChain: How to Build AI workflows in n8n (2026)

Complete integration guide for n8n and LangChain

高级

Building SQL Query Agent with AI Agents: Complete Guide 2026

Create autonomous translate natural language to SQL and execute queries using LLM agents

高级

Hybrid Search RAG: Implementation Guide with Elasticsearch 2026

Build a combining vector and keyword search for maximum recall RAG system from scratch

入门

LangChain Project Scaffold: Starter Guide

Opinionated LangChain project structure for teams

高级

Building DevOps Automation Agent with AI Agents: Complete Guide 2026

Create autonomous monitor systems and automate infrastructure tasks using LLM agents

高级

Building Email Triage Agent with AI Agents: Complete Guide 2026

Create autonomous read, categorize, and draft email responses using LLM agents

进阶

Django + LangChain: How to Add AI to Django web apps (2026)

Complete integration guide for Django and LangChain

高级

Building Content Writer Agent with AI Agents: Complete Guide 2026

Create autonomous research and write high-quality content at scale using LLM agents

进阶

LangChain vs LlamaIndex: Side-by-Side Comparison

Framework comparison for building RAG applications — comparing developer experience across langchain and llama-index

高级

Contextual Compression RAG: Implementation Guide with Pinecone 2026

Build a compressing retrieved context to fit LLM window RAG system from scratch

高级

Self-Query RAG: Implementation Guide with Qdrant 2026

Build a AI-generated metadata filters for precise retrieval RAG system from scratch

进阶

LangSmith LLM Observability: Complete Setup Guide

Debugging and monitoring LLM chains with LangSmith

高级

Building Customer Support Agent with AI Agents: Complete Guide 2026

Create autonomous handle customer inquiries using your knowledge base using LLM agents

进阶

Adaptive RAG: Advanced RAG Tutorial

Dynamic routing between different retrieval strategies

高级

AI Agent Architecture: Complete Developer Guide 2026

Master AI Agent Architecture with practical examples and production patterns

高级

Graph RAG: Implementation Guide with Neo4j 2026

Build a knowledge graph traversal for multi-hop reasoning RAG system from scratch

进阶

Autonomous Research Agent

Building agents that autonomously search and synthesize — hands-on project tutorial

进阶

RAG System Design Guide

Step-by-step RAG system design for architecture interviews

高级

Memory-Augmented AI Agent: Complete Tutorial

Implementing short and long-term memory for AI agents

进阶

LangChain vs LlamaIndex Comparison: Complete Developer Guide 2026

Master LangChain vs LlamaIndex Comparison with practical examples and production patterns

高级

Parent Document RAG: Implementation Guide with Chroma 2026

Build a retrieving small chunks with large parent context RAG system from scratch

进阶

MCP with LangGraph Agents: Complete Guide

Using MCP tools in LangGraph agent workflows

高级

Self-Healing Agent: Complete Tutorial

Agent that detects and recovers from its own errors

高级

Building Data Analysis Agent with AI Agents: Complete Guide 2026

Create autonomous analyze datasets and generate insights autonomously using LLM agents

高级

Time-Aware RAG: Implementation Guide with Pinecone 2026

Build a weighting recent documents higher in retrieval RAG system from scratch

入门

LangChain vs LlamaIndex: Which is Better for RAG applications? (2026)

Detailed comparison of LangChain and LlamaIndex for RAG applications

入门

LangSmith Complete Tutorial 2026: How to debug, test, and monitor LLM applications

Step-by-step guide to using LangSmith for AI-powered devops workflows

进阶

Conversational AI with Memory

Implementing persistent memory in chatbots — hands-on project tutorial

入门

LangSmith vs Langfuse: Which is Better for LLM observability? (2026)

Detailed comparison of LangSmith and Langfuse for LLM observability

高级

Planning and Execution Agent: Complete Tutorial

Agent with high-level planning and step-by-step execution

进阶

Build an Document Q&A with LangChain + Pinecone: Step-by-Step Tutorial 2026

Create a production-ready enterprise knowledge base from scratch

高级

Cross-Encoder RAG: Implementation Guide with Qdrant 2026

Build a neural reranking for high-precision retrieval RAG system from scratch

进阶

Corrective RAG (CRAG): Advanced RAG Tutorial

Self-correcting RAG with web search fallback

高级

Hierarchical Agent System: Complete Tutorial

Multi-level agent hierarchy with delegation and reporting

进阶

LangChain ReAct Agent from Scratch

Building a ReAct agent with tools using LangChain — hands-on project tutorial

入门

OpenAI Assistants vs LangGraph: Which is Better for building AI agents? (2026)

Detailed comparison of OpenAI Assistants and LangGraph for building AI agents

高级

Research Agent with Citations: Complete Tutorial

Autonomous research agent that cites sources accurately

进阶

RAG vs Fine-tuning: Side-by-Side Comparison

When to use retrieval augmentation vs fine-tuning — comparing accuracy and cost across openai and langchain

高级

LangChain vs LangGraph 实战指南:Agent 框架如何选,一篇讲清楚

从实际项目需求出发,告诉你该用哪个框架

高级

AI Agent Frameworks: LangChain, AutoGen & CrewAI for Production in 2025

Build reliable AI agents that use tools, plan multi-step tasks, and collaborate in teams

进阶

LlamaIndex 实战指南:RAG 应用开发从入门到生产

LlamaIndex vs LangChain 怎么选?5个真实场景代码示例

高级

用 LangGraph 构建多步骤 Agent

状态机思维:让 Agent 像工作流一样可控

进阶

LlamaIndex vs LangChain:到底该用哪个搭 RAG(2026 实战对比)

两个都用过半年后,我把选型逻辑讲清楚:什么项目用 LlamaIndex,什么项目用 LangChain

进阶

LangSmith vs Langfuse:LLM 可观测性工具怎么选(2026)

一个闭源好用、一个开源能自托管,关键看你在不在乎数据出境和成本

进阶

Vercel AI SDK vs LangChain:前端做 AI 应用该用哪个(2026)

一个为前端流式 UI 而生,一个是全能编排框架——其实很多项目两个都要

高级

LangChain vs LangGraph 2026深度对比:何时用哪个框架?

从线性链到有状态图:理解两者的设计哲学和适用边界

高级

LangGraph 状态机 Agent 2026:构建可控的复杂 AI 工作流

超越简单Chain,用图结构实现真正可调试、可维护的AI流程

进阶

AI Agent Frameworks Compared: LangChain vs LlamaIndex vs AutoGen vs CrewAI

Which AI agent framework should you choose for production applications in 2025?

入门

LlamaIndex RAG Template: Starter Guide

Production LlamaIndex RAG project with evaluation

高级

LangChain LCEL: Advanced Patterns for Production AI Applications

Master LangChain Expression Language for composable, streaming AI pipelines

进阶

LangSmith Tracing: Developer Guide and Quick Start 2026

Learn LangSmith Tracing: debug and trace LangChain applications

入门

Vercel AI SDK vs LangChain.js: Which is Better for Next.js AI apps? (2026)

Detailed comparison of Vercel AI SDK and LangChain.js for Next.js AI apps

进阶

Node.js + LangChain.js: How to Build Node.js AI applications (2026)

Complete integration guide for Node.js and LangChain.js

入门

Flowise Complete Tutorial 2026: How to create LangChain flows with drag-and-drop UI

Step-by-step guide to using Flowise for AI-powered platform workflows

高级

LangChain LCEL生产指南:构建可靠、可观测的LLM应用链

从原型到生产,掌握LangChain Expression Language的高级用法

入门

Quick Tip: Connect any AI to your database with LangChain

Practical guide to connect any ai to your database with langchain

进阶

CrewAI vs AutoGen vs LangGraph: Side-by-Side Comparison

Multi-agent framework comparison — comparing agent patterns across crewai and autogen

进阶

LlamaIndex Data Ingestion: Tutorial and Best Practices

Build production AI with LlamaIndex — document pipelines and query engines

入门

AI Recipe: Load and query a PDF with LlamaIndex

Step-by-step implementation: load and query a pdf with llamaindex

进阶

Build a Production RAG Application with LlamaIndex and Qdrant

Document ingestion, hybrid search, reranking, and evaluation with LlamaIndex

进阶

LangSmith for LLM Evaluation: Building Systematic Feedback Loops

Trace collection, evaluation datasets, A/B testing, and regression detection

高级

LangChain in Production: Best Practices, Pitfalls, and Performance Optimization

Lessons from deploying LangChain applications handling millions of requests

进阶

Build an AI Knowledge Graph with Neo4j + LangChain: Step-by-Step Tutorial 2026

Create a production-ready semantic knowledge base from scratch