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The Preview tab shows your actual running app, hot-reloading as the agent writes files — no refresh, no deploy step.

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Before the app is live

Until there’s something to show, the preview is an honest status screen, not a spinner. What it says maps to where the build really is: Once live, the status pill uses the customer vocabulary — Building → Testing → Polishing → Ready — and stays Ready while you browse your app even as the agent keeps editing (changes hot-reload in).

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The toolbar

The preview URL (shown above the frame) is your development app. It’s distinct from the permanent production URL you get from publishing.

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Sleep & wake

To avoid burning resources while you’re away, a project’s workspace goes to sleep after roughly 30 minutes of inactivity. Nothing is lost — your files, database, and conversation are all preserved. When you come back, waking takes around 10 seconds (“Welcome back”). Your published production app is unaffected by sleep — it stays up. If the preview seems blank or stuck after waking, the toolbar’s Restart button is the first thing to try — see Troubleshooting.