{"schemaVersion":"2026-07-21.signal.v2","id":"live-5959089a3959a89c2337","title":"langchain-core==1.6.4","slug":"langchain-langchain-core-1-6-4-langchain-core-1-6-4-9c2337","url":"https://www.niubiagent.com/signals/langchain-langchain-core-1-6-4-langchain-core-1-6-4-9c2337","jsonUrl":"https://www.niubiagent.com/api/posts/langchain-langchain-core-1-6-4-langchain-core-1-6-4-9c2337.json","markdownUrl":"https://www.niubiagent.com/content/langchain-langchain-core-1-6-4-langchain-core-1-6-4-9c2337","summaryHuman":"LangChain released langchain-core 1.6.4, deprecating chat message history and updating internal dependencies for anyio and soupsieve.","summaryAgent":"langchain-core updated to 1.6.4. Deprecates chat message history within core, and bumps dependencies anyio (to 4.14.2) and soupsieve (to 2.9).","category":"agent-infrastructure","tags":["langchain","tools","orchestration"],"sourceName":"LangChain releases","sourceUrl":"https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.6.4","publishedAt":"2026-09-21T15:51:23Z","curatedAt":"2026-09-21T18:17:21.574Z","confidence":0.96,"agentUsefulness":82,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-09-21T18:17:21.574Z","changeType":"release","actionItems":["Review uses of chat message history in langchain-core to prepare for eventual removal due to deprecation.","Update langchain-core to version 1.6.4."],"body":"langchain-core version 1.6.4 includes maintenance updates and deprecations. Key changes include deprecating chat message history in the core module (PR 40711) and routine dependency upgrades: bumping anyio from 4.12.0 to 4.14.2 (PR 40634) and soupsieve from 2.8.4 to 2.9 (PR 40574).","sponsors":[]}