Cloud Sessions and Your Phone

Cowork sessions can run remotely: the work happens in an isolated cloud sandbox on Anthropic's infrastructure, with your files and session state saved to your Claude account and synced across devices. Start a task at your desk, close the laptop, and it keeps going. Check it from your phone at lunch. The cloud sandbox is locked down by default — no outside network access unless an admin allows it, file access limited to what you authorized.

Mobile turns this from a feature into a workflow. The Cowork beta on iPhone, iPad, and Android (rolling out from the Max plan onward) lets you assign tasks from anywhere and steer running sessions through a persistent thread — Claude hits a decision point at 2pm, your phone buzzes, you answer in one line, work resumes. Riley Brown runs most of his agent work phone-first, walking and delegating; you don't have to go that far to feel the shift: work stops being a place your laptop is.

The practical division: local sessions when the task needs files that only exist on your machine; cloud sessions for anything long-running, anything you'll want from another device, and everything scheduled — which is the next lesson.