Yes, it’s a bit of a magic argument, but it’s the only unhygienic variable introduced with a Plug dispatch: https://github.com/elixir-plug/plug/blob/main/lib/p

Yes, it’s a bit of a magic argument, but it’s the only unhygienic variable introduced with a Plug dispatch: https://github.com/elixir-plug/plug/blob/main/lib/plug/router.ex#L582-L589 https://github.com/elixir-plug/plug/blob/main/lib/plug/route... Everything else is explicitly passed, AFAICT.