$ brew install wail
...installs the latest release v0.2019.05.21, which is very obsolete from the repo HEAD. On macOS 13.1 x86, after installing via homebrew and double-clicking on the app, a warning appears:

This is easily circumvented by right-clicking on the icon and selecting "open", again presented with a warning, but this first impression is not ideal.
I believe the application needs to be notarized (see notes in #446) or some other process of verification to prevent this warning.