Browser Enables Secure Agent Sandboxing For Files

Paul Kinlan, a web platform developer advocate at Google, recently explored using the web browser as a sandbox to run LLM-driven agents and published detailed notes and a demo called Co-do. The demo uses the File System Access API, CSP/iframe sandboxing, and WebAssembly in Web Workers to enable LLM-based file interactions without multi-gigabyte local containers. This approach suggests browser-hosted agents can provide secure, practical tooling for local files.