Secure code execution for AI agents with AWS Lambda MicroVMs

This article describes a three-layer architecture for secure code execution by AI coding agents building serverless applications on AWS.

• Lambda MicroVMs provide isolated, ephemeral compute environments with Firecracker-based virtualization for safe agent code execution
• Agent Toolkit for AWS encodes production best practices like least-privilege IAM, observability, and safe deployment patterns
• Policy in AgentCore enforces deterministic governance using Cedar policies to control what agents can do at the tool access boundary
• Agents can write, test, and deploy applications within MicroVMs while policies prevent unauthorized actions like production deployments
• Cedar policies are evaluated outside the agent's reasoning loop, preventing prompt injection from bypassing security controls

Together, these three layers enable AI agents to safely build and deploy production-grade serverless applications with organizational control and governance.