Cloudflare has open-sourced Cloudflare OS, a "vibe-coding" platform originally designed to enable non-technical employees to build applications via natural language prompts processed by AI agents. Internally, the platform is utilized daily by thousands of employees to automate tasks, create documents, and develop data visualization tools. To mitigate the security risks inherent in allowing non-developers to generate code, Cloudflare implemented a robust sandboxing architecture based on its existing Dynamic Workers technology. Rather than utilizing traditional software containers, the platform employs "isolates"—individual instances of the V8 JavaScript execution engine—to run each application in a fine-grained, isolated environment. This architectural choice provides significant performance advantages, as these isolates can initialize in just a few milliseconds and consume only a few megabytes of memory. Consequently, this method is 100 times faster and 10 to 100 times more memory-efficient than standard containerization. By ensuring that each user runs a private, isolated copy of the code, Cloudflare aims to provide a secure sandbox where AI-generated code cannot introduce significant security vulnerabilities or facilitate data breaches.