{"generatedAt":"2026-10-24T12:11:27.697Z","canonicalUrl":"https://agentbreakwatch.vercel.app/p/langgraph-js","llmsTxtUrl":"https://agentbreakwatch.vercel.app/p/langgraph-js/llms.txt","categoryHub":{"slug":"agent-sdks","title":"AI Agent SDKs & Frameworks Breaking-Change Index","url":"https://agentbreakwatch.vercel.app/c/agent-sdks"},"tldrVerdict":"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. v1.x StateGraph Annotation reducer syntax and interrupt() resume semantics updated; createReactAgent moved to @langchain/langgraph/prebuilt.","package":{"slug":"langgraph-js","packageName":"@langchain/langgraph","registry":"npm","kind":"sdk","subcategory":"Agent Framework","displayName":"LangGraph.js","vendor":"LangChain","githubRepo":"langchain-ai/langgraphjs","breakingSummary":"v1.x StateGraph Annotation reducer syntax and interrupt() resume semantics updated; createReactAgent moved to @langchain/langgraph/prebuilt.","schemaDriftRisk":"high","affectedSymbols":["StateGraph","Annotation","interrupt","Command"],"migrationBefore":"const workflow = new StateGraph({ channels: { messages: { value: (a, b) => a.concat(b) } } });","migrationAfter":"const State = Annotation.Root({ messages: Annotation({ reducer: (a, b) => a.concat(b) }) });\nconst workflow = new StateGraph(State);","description":"LangGraph","latestVersion":"1.5.2","latestPublishedAt":"2026-10-21T19:43:17.464Z","recentVersions":[{"version":"1.5.2","publishedAt":"2026-10-21T19:43:17.464Z"},{"version":"1.5.1","publishedAt":"2026-10-16T20:55:30.038Z"},{"version":"1.5.0","publishedAt":"2026-10-12T23:19:38.677Z"},{"version":"1.4.21","publishedAt":"2026-10-07T16:28:15.194Z"},{"version":"1.4.20","publishedAt":"2026-10-06T22:52:22.609Z"},{"version":"1.4.19","publishedAt":"2026-10-03T18:39:33.809Z"}],"releasesLast90d":17,"dependenciesCount":4,"license":"MIT","registryUrl":"https://www.npmjs.com/package/@langchain/langgraph","githubUrl":"https://github.com/langchain-ai/langgraphjs","installCommand":"npm install @langchain/langgraph@1.5.2","stabilityScore":74,"stabilityGrade":"C+"}}