toggle is a tiny go tool that acts as a toggle for any program using a lockfile.
you run it with a program like toggle myscript.sh - it creates a lockfile (by hash or name with --name), starts the program, and saves its PID.
next time you run the same toggle, it finds the lockfile, reads the PID, and sends it a signal (default SIGTERM, or custom with --signal).
handy for hotkeys that launch infinite loop scripts (like autoclickers) - press once to start, press again to kill.
go install github.com/notwithering/toggle@latest