a vanilla-JS agent UI library with native WebMCP (MIT)" (opens in new tab)

It's definitely early - it shipped in the very latest version of chrome just this week, and the spec may still evolve (as a fair warning to early adopters).You can turn it on for your site via the chrome origin trial, or just install the polyfill.Our use case with Persona is all about extending existing apps to have "AI assistance" that actually works well, and Persona being the AI assistant you can ship yourself in your site to enhance your app. There's a parallel camp who are interested in ...