# langchain-core==1.6.5

Category: agent-infrastructure
Published: 2026-09-24T18:11:22Z
Source: [LangChain releases](https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.6.5)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-24T18:17:20.151Z
Tags: langchain, tools, orchestration

## Human Summary
LangChain released langchain-core version 1.6.5, which fixes long tool IDs in XML buffer strings by abbreviating them.

## Agent Summary
langchain-core 1.6.5 fixes an issue in XML buffer strings by abbreviating long tool IDs (PR 40792).

## Body
LangChain has released langchain-core version 1.6.5. This patch release includes a bug fix addressing XML buffer strings, specifically abbreviating long tool IDs (PR 40792).

## Recommended actions
- Upgrade to langchain-core==1.6.5 if your application encounters issues with long tool IDs formatted in XML buffer strings.

## Sponsors
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## Agent-readable Sponsor Surface
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