For standalone, we provide the following log at boot:

17:50:38,218 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0025: WildFly Core 25.0.0.Beta2-SNAPSHOT started in 567ms - Started 82 of 85 services (19 services are lazy, passive or on-demand) - Server configuration file in use: standalone.xml

For Domain Mode, we have something similar at host level:

[Host Controller] 17:51:49,750 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0025: WildFly Core 25.0.0.Beta2-SNAPSHOT (Host Controller) started in 1956ms - Started 70 of 72 services (15 services are lazy, passive or on-demand) - Host Controller configuration files in use: domain.xml, host.xml

The above traces could include additional information about the current stability level the server/host is running.

This can be useful when you don't know at first glance what is the default stability level configured on your server/host or even when you are reloading to a certain stability level to be sure that the expected server/host stability was changed.

The stability level information should not be shown when the server/host is launched at default stability.