A website starts a demo trip booking journey, a Chrome side panel finishes it, and nothing passes between them. What the 2026-07-28 stateless core makes possible, and what 'stateless' did and didn't mean before it.
Dynamic WebMCP tools keep the runtime tidy but hide the longer journey. Skills can hand agents a map - and Agentic Resource Discovery might help them find it.
On the wire, delegating to a page's agent looks identical to calling a plain tool. The difference is who does the thinking - and, it turns out, whose wallet pays.
On-site, in-browser, off-browser - where an agent lives decides who holds control, how far a task can travel, and whether a human ever sees your website.