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LangChain AI Updates: October 21, 2026

langchain deep-agents agents coding-agents open-source

1. Deep Agents Code 0.1.87 Adds Non-Interactive Thread Resume and Cache-Aware Compaction

LangChain. LangChain released deepagents-code 0.1.87 on October 20, adding the ability to resume threads in non-interactive mode. The release compacts large idle sessions before the prompt cache expires and shows the prompt-cache expiration time to users. It also adds support for a custom Slack OAuth app identity, loading older threads from the thread switcher, and fixes for non-ASCII file names in @ mentions and for the local server outliving its owner process. Source