June 2026: LangChain Newsletter

LangSmith has introduced several new features and updates, including an on-call copilot for triage, computer use in Fleet, voice traces, and a new course on LangSmith Deployment. The Fleet On-Call Copilot is a prebuilt agent template designed to help manage alerts and updates, while the computer use feature allows agents to work on an isolated virtual computer. The new interface for voice traces facilitates faster audio debugging with an inline player, and experiment status tracking offers live progress updates. The platform has also integrated with Slack for notifications and introduced open-source tools like RubricMiddleware for self-evaluation by Deep Agents. Additionally, LangSmith has rolled out programmatic subagents to optimize workloads and enhance results. The company is hosting a series of events, workshops, and meetups in various cities, focusing on building and deploying agents with LangChain. Notable success stories include Box's improved agent iteration speed and Harmonic's enhanced customer retention through LangSmith Deployment. Users are encouraged to stay updated through the LangChain blog, changelog, and YouTube channel.