Your Antigravity agents were still working.
Your Mac didn't care.

Why your Mac sleeps while Antigravity's agents are still going

Antigravity's agents spend most of a run waiting on the model — planning, generating code, verifying results — and waiting on a model response barely uses any CPU. macOS only looks at CPU and user input to decide whether to sleep, so an agent that's "thinking" hard but computing little looks idle to the OS. After your screen-sleep or system-sleep timer runs out, macOS suspends the Mac, and every agent in the Agent Manager is frozen along with it until you wake it back up.

Antigravity makes this worse than a normal IDE, in a good way: the whole point of the Agent Manager is dispatching agents to work asynchronously while you do something else. The moment you walk away is exactly when your sleep timer starts counting down.

The fix is to stop macOS from sleeping for as long as the agents are actually running — then let it sleep normally again shortly after they go quiet — within your grace window, 90 seconds by default. You can do that for free in two minutes, or with a tool that knows the difference between "agent working" and "agent idle" so you don't have to babysit it.

If you only dispatch an Antigravity agent occasionally, you don't need to buy anything. Two solid free options:

• The built-in caffeinate command. Open Terminal and run caffeinate -i before you kick off a long Antigravity run. It'll hold sleep off until you close the Terminal window or press Ctrl+C. Simple, free, already on your Mac.
• Amphetamine (free, Mac App Store). Gives you a menu-bar toggle and basic process triggers, so you can set it to stay awake while specific apps are running.

Both are a fine choice if your agent runs are short and rare. The catch: neither one knows when Antigravity's agents actually finished. You either turn it off yourself, or it keeps your Mac awake — and your battery draining — long after the last agent reported done.

Does AgentBarista support Antigravity out of the box?

Yes — Antigravity is a built-in entry in the supported-agent list, so you just turn it on. For anything not in the list yet, AgentBarista watches real activity signals (a process's CPU, including its child processes, and on-screen text via macOS Accessibility), and you can add any app as a watched target in Settings.

Why not just use caffeinate or Amphetamine?

If you only run agents occasionally, do exactly that — they're free and they work. AgentBarista earns its price when agents are part of your daily work: it starts and stops on its own based on actual agent activity, it won't leave your battery pinned overnight because you forgot to turn something off, and it shows you how much time it actually saved.

What happens if I'm running on battery?

AgentBarista has a battery cutoff: when the charge drops to your configured floor, it stops holding the Mac awake and lets macOS sleep normally. Keeping a run alive is never worth a dead battery — that safety net is a big part of why this exists.

Does it read my code or my prompts?

No. AgentBarista never opens your files. To tell a working agent from a finished one it looks at process command lines and CPU, at the names and modification times of your agents' session files, and — only if you grant macOS Accessibility permission — at the on-screen text of the agent apps you enable and of the terminals we support. Two of those can contain your own words: a command line includes any prompt you pass on it, and on-screen text includes whatever is visible in that window, your code included. Both are matched against status phrases on your Mac and discarded on the spot: never stored, never sent. Nothing about your work leaves your Mac — no file contents, no code, no prompts, no file names, no activity data. Your stats and settings stay on this Mac. The app contains no analytics or telemetry of any kind. Its one network call is license validation, sent to our payment provider, Lemon Squeezy: activating a license sends your license key and your Mac's name, and the routine check after that sends your license key and an anonymous instance id — nothing else.