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what do you want it to listen for exactly?

maybe just write a small wrapper script, depending on what you want to do?

I just want it to terminate when STDIN terminates

Nothing, just quit :slightly_smiling_face:

is phoenix closing stdin to signal that the watcher should quit? why is it not sending SIG_INT or SIG_TERM or similar signals?

No idea, likely a responsibility/architecture thing, they explain it more here <https://hexdocs.pm/elixir/Port.html#module-zombie-operating-system-processes> (I know there's a wrapper script, but that's not ideal) :slightly_smiling_face: