Anthropic Releases sandbox-runtime: OS-Level Sandboxing for AI Agents Without Containers

Anthropic has released sandbox-runtime, an open tool that provides OS-level sandboxing for AI agents without requiring Docker or traditional container infrastructure. The project enables developers to run agent-executed code in isolated environments using lightweight OS primitives, reducing both setup complexity and attack surface compared to full container stacks. For developers deploying autonomous coding agents or tool-using LLM pipelines, this directly addresses a critical production safety gap — untrusted code execution in agentic loops. sandbox-runtime integrates with existing agent frameworks and is particularly relevant for teams building Claude-based agents or any system where the model can invoke shell commands or run arbitrary code. The release signals Anthropic's investment in the infrastructure layer required to safely productionize agentic AI.