diff --git a/scripts/setup.sh b/scripts/setup.sh
index dbcb0381..a92cc104 100755
--- a/scripts/setup.sh
+++ b/scripts/setup.sh
@@ -258,6 +258,31 @@ else
   esac
 fi
 
+# ─── 4b. Disable auto-suspend (server doesn't need to sleep) ──────────────────
+echo ""
+echo "── Auto-suspend (disable for server) ──"
+
+# Disable system suspend/hibernate
+if systemctl is-enabled sleep.target 2>/dev/null | grep -q "enabled\|masked"; then
+  sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target 2>/dev/null
+  ok "Masked sleep/suspend targets"
+else
+  skip "sleep targets already masked"
+fi
+
+# Configure logind to ignore idle
+sudo tee /etc/systemd/logind.conf > /dev/null << 'LOGIND_EOF'
+[Login]
+HandleLidSwitch=ignore
+HandleLidSwitchExternalPower=ignore
+HandlePowerKey=ignore
+IdleAction=none
+RuntimeDirectorySize=10%
+LOGIND_EOF
+
+sudo systemctl restart systemd-logind
+ok "Configured logind to disable auto-suspend"
+
 # ─── 5. Node.js 22 ────────────────────────────────────────────────────────────
 echo ""
 echo "── Node.js 22 (system-wide) ──"