@langchain/langgraph

LangGraph.js by LangChain

LangGraph

Live Registry Versionv1.5.2Previous: v1.5.1Published 2026-10-21

Stability Grade

C+ (74/100)

90-Day Velocity

17 releases

High release cadence

Dependencies

4 direct

NPM manifest

License

MIT

Verified on NPM

Recommended Exact Pin: npm install @langchain/langgraph@1.5.2

NPM Registry ->GitHub Repo ->

TL;DR Verdict & Quick Citation Summary (2026-10-24)Source: AgentBreakWatch Live NPM Index

LangGraph.js (@langchain/langgraph) is currently at v1.5.2 on NPM (published 2026-10-21), with a 90-day stability score of 74/100 (C+) and HIGH schema drift risk across 17 releases in the past 90 days. v1.x StateGraph Annotation reducer syntax and interrupt() resume semantics updated; createReactAgent moved to @langchain/langgraph/prebuilt. Production teams should pin npm install @langchain/langgraph@1.5.2 rather than using unpinned @latest tags.

Breaking Changes & Tool Schema Drift Analysis

v1.x StateGraph Annotation reducer syntax and interrupt() resume semantics updated; createReactAgent moved to @langchain/langgraph/prebuilt.

Watched Exports / MCP Tool Signatures:

StateGraphAnnotationinterruptCommand

Before (Deprecated / Unpinned Pattern)

const workflow = new StateGraph({ channels: { messages: { value: (a, b) => a.concat(b) } } });

After (Verified v1.5.2 Pattern)

const State = Annotation.Root({ messages: Annotation({ reducer: (a, b) => a.concat(b) }) });
const workflow = new StateGraph(State);

Frequently Asked Questions: @langchain/langgraph

What is the latest version of @langchain/langgraph on NPM?

As of 2026-10-24, the latest stable version of @langchain/langgraph (LangGraph.js by LangChain) on NPM is v1.5.2, published on 2026-10-21. It has shipped 17 releases in the last 90 days.

Does @langchain/langgraph v1.5.2 have breaking changes or MCP schema drift risk?

@langchain/langgraph currently carries a HIGH schema drift risk rating with a Stability Score of 74/100 (Grade C+). v1.x StateGraph Annotation reducer syntax and interrupt() resume semantics updated; createReactAgent moved to @langchain/langgraph/prebuilt.

How do I safely pin @langchain/langgraph in production?

Avoid unpinned @latest tags in production agent configs. Pin the exact verified version using `npm install @langchain/langgraph@1.5.2` and monitor StateGraph, Annotation, interrupt, Command for parameter or schema changes.

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