Polls /proc/meminfo swap and /proc/pressure/memory PSI every 3s; on a
rising edge into critical, reveals an always-running, normally-minimized
GTK3 process-killer window via kdotool rather than spawning anything new
at the exact moment the system is least able to launch a process.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
