Everything the Adapter needs, as one child.

Three processes and a :logger handler have to agree about a socket path and a server name. Wiring them by hand means four places to get it right and one troubleshooting entry that begins "check that the paths match", which is a design apologising for itself.

children = [
  {Bellwether.Supervisor, socket: "/tmp/bellwether.sock", own_apps: [:my_app]}
]

Options may equally live in application config, where a release can override them without a code change:

config :bellwether,
  socket: "/tmp/bellwether.sock",
  own_apps: [:my_app],
  backtrace_depth: 32

Anything passed to start_link/1 wins over config, which wins over the defaults.