Let AI Take Over Your App: Building a Seamless, Microsecond-Level Ruby Security Sandbox

In the era of AI, traditional software development paradigms have shifted significantly, bringing forth entirely new opportunities. Have you ever wondered if AI could dynamically implement new features right within your Ruby or Rails environment?

Kobako was originally designed as a WebAssembly sandbox to bring the "Code Mode" mechanism into the Ruby ecosystem, allowing AI to write short scripts directly instead of orchestrating a massive number of fragmental MCP (Model Context Protocol) tools.

However, inspired by druby, Kobako leverages Ruby’s dynamic language features to interact seamlessly with arbitrary objects in the Host environment. This opens up a completely different approach for AI to assist and drive software development.

Sandbox technology is a crucial branch of "Harness Engineering," a topic being widely discussed this year. Centered on the core challenge of how to execute untrusted code safely, this talk will share the development and exploration journey of Kobako, showcasing a security sandbox born purely from embracing Ruby’s unique language features.