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A laptop that suspends freezes every agent session until it wakes. The new opt-in setting (App Settings > System > Power, off by default, "Only on AC power" on by default) makes the server hold an OS sleep lock for exactly as long as it runs: - Linux: a logind block lock on handle-lid-switch:sleep:idle through systemd-inhibit. The lid needs the low-level handle-lid-switch lock (LidSwitchIgnoreInhibited=yes ignores a plain sleep lock), and polkit grants it only while someone is logged in to the desktop, so a refusal is reported as "denied" and retried every minute. - macOS: caffeinate -i -s -w <pid>. Lid close needs pmset disablesleep, which an optional root helper (scripts/keep-awake-macos.sh, a LaunchDaemon run from a root-owned copy) applies while the server keeps a fresh request file, undoing only a disablesleep it set itself. The lock dies with the server: systemd-inhibit runs cat on a stdin pipe, so any exit (SIGKILL included, and under the unit's KillMode=process) releases it; caffeinate exits with the pid it watches. The installer asks on laptops (default no, never under --yes), and `install.sh keep-awake` turns it on for an existing install. Status is at GET /api/system/keep-awake; a non-admin's value is dropped in multi-user mode. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>