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Managing Agent Context with LangChain: Summarization Middleware Explained

Managing Agent Context with LangChain: Summarization Middleware Explained

LangChain November 25, 2025
Long-running agents eventually hit context overload — leading to context poisoning, distraction, confusion, and degraded performance. In this video, Christian …
 
What are Deep Agents?

What are Deep Agents?

LangChain November 24, 2025
Deep Agents is a term we coined to describe agents capable of handling complex, open-ended tasks over long time horizons. …
 
Build a Research Agent with Deep Agents

Build a Research Agent with Deep Agents

LangChain November 20, 2025
Deepagents is a simple, open source agent harness built by LangChain. It uses some common principle seen in popular agents …
 
Model Call Limit Middleware (Python)

Model Call Limit Middleware (Python)

LangChain November 20, 2025
Learn about how to use LangChain's model call limit middleware as a guardrail for agents. This middleware can be used …
 
Agents Gone Wild? Use Tool Call Limits in LangChainJS to Keep Them in Check!

Agents Gone Wild? Use Tool Call Limits in LangChainJS to Keep Them in Check!

LangChain November 20, 2025
In this tutorial, Christian Bromann will show you how to prevent runaway tool usage using the Tool Call Limit Middleware …
 
Building a Research Agent with Gemini 3 + Deep Agents

Building a Research Agent with Gemini 3 + Deep Agents

LangChain November 19, 2025
Google's eagerly anticipated Gemini 3 Pro release shows state-of-the-art performance across a wide range of agentic evaluations. Here, we show …
 
Model Fallback Middleware (Python)

Model Fallback Middleware (Python)

LangChain November 18, 2025
Learn about how to use LangChain's new model fallback middleware to add resilience to your applications. Automatically switch between models …
 
Stop Endless Back-and-Forth — Add Model Call Limits in LangChainJS

Stop Endless Back-and-Forth — Add Model Call Limits in LangChainJS

LangChain November 18, 2025
Is your support agent getting stuck in endless back-and-forth conversations? Users asking the same thing three different ways? Or long …
 
LangChain Academy New Course: LangSmith Essentials

LangChain Academy New Course: LangSmith Essentials

LangChain November 13, 2025
Testing applications is essential to the development lifecycle, but LLM systems are non-deterministic – you can’t always predict how they …
 
To-Do List Middleware (Python)

To-Do List Middleware (Python)

LangChain November 13, 2025
Learn about how to use LangChain's to-do list middleware to equip agents with task planning and tracking capabilities for complex …
 
Why Most AI Agents Fail — and How a Simple Todo List Fixes It

Why Most AI Agents Fail — and How a Simple Todo List Fixes It

LangChain November 13, 2025
Most AI agents don’t fail because the model is bad — they fail because they don’t plan. In this video, …
 
Execute code with sandboxes for Deep Agents

Execute code with sandboxes for Deep Agents

LangChain November 13, 2025
We're excited to launch Sandboxes for DeepAgents, a new set of integrations that allow you to safely execute arbitrary code …
 
Add a Human-in-the-Loop to Your LangChain Agent (Next.js + TypeScript Tutorial)

Add a Human-in-the-Loop to Your LangChain Agent (Next.js + TypeScript Tutorial)

LangChain November 12, 2025
Bring humans back into the loop 👩‍💻 — this tutorial shows how to integrate Human-in-the-Loop (HITL) middleware into your LangChainJS …
 
Tool Call Limit Middleware (Python)

Tool Call Limit Middleware (Python)

LangChain November 12, 2025
Learn about how to use LangChain's tool call limit middleware to control an agent's tool calling abilities across single interactions …
 
How Agents Use Context Engineering

How Agents Use Context Engineering

LangChain November 12, 2025
This video covers the core principles of context engineering for AI agents and how they're implemented across popular frameworks like …
 
Building a Typescript deep research agent

Building a Typescript deep research agent

LangChain November 6, 2025
In this video, we will walk through how to easily build a Typescript deep research agent This builds upon our …
 
Build a Streaming LangChain Agent in Next.js with useStream

Build a Streaming LangChain Agent in Next.js with useStream

LangChain November 6, 2025
Learn how to build a minimal LangChain agent inside a Next.js app using the useStream hook. We’ll stream responses, render …
 
Human in the Loop Middleware (Python)

Human in the Loop Middleware (Python)

LangChain November 4, 2025
Learn about how to use LangChain's human in the loop middleware to approve, edit, and reject tool calls before they're …
 
Why We Built LangSmith for Improving Agent Quality

Why We Built LangSmith for Improving Agent Quality

LangChain November 4, 2025
Harrison Chase (CEO of LangChain) sits down with Bagatur (LangSmith Engineer) and Tanushree (Product Manager) for a technical roundtable on …
 
Deep Agent CLI: Coding Assistant with Memory

Deep Agent CLI: Coding Assistant with Memory

LangChain October 31, 2025
Using the deepagents package, we built a simple coding CLI as an example of a coding application you could build …
 
Inside LangSmith's No Code Agent Builder

Inside LangSmith's No Code Agent Builder

LangChain October 30, 2025
Harrison Chase (CEO of LangChain) sits down with Brace (Applied AI) and Sam (PM) for a technical roundtable on LangChain's …
 
Get Started with LangSmith Agent Builder

Get Started with LangSmith Agent Builder

LangChain October 29, 2025
LangSmith Agent Builder (now in private preview) lets anyone create agents through a text-to-agent experience — no coding or prompt …
 
LangChain Academy New Course: LangGraph Essentials

LangChain Academy New Course: LangGraph Essentials

LangChain October 27, 2025
In our newest LangChain Academy course, LangGraph Essentials, you can learn the basics of LangGraph in less than an hour …
 
LangChain Academy New Course: LangChain Essentials

LangChain Academy New Course: LangChain Essentials

LangChain October 27, 2025
In our newest LangChain Academy course, LangChain Essentials, you can learn the basics of LangChain in less than an hour …