LangChain launches LangSmith Sandboxes to give every AI agent its own secure computer

LangChain has introduced LangSmith Sandboxes, hardware-virtualized microVMs designed to give every AI agent its own isolated computer for secure code execution. The company argues that containers are insufficient for production agents because they share the host kernel, leaving them vulnerable to exploits like the recent Copy Fail CVE and supply chain attacks. Each sandbox provides a full machine with filesystem, shell, package manager, and persistent state, spinning up instantly like serverless functions while remaining completely isolated from production infrastructure. The release includes production primitives such as snapshots, forks, and blueprints for pre-warmed environments, enabling use cases from automated coding and data analysis to CI agents and large-scale RL eval harnesses.