apex_cli Class that handles all functions executed via the apex.php CLI script within the installation directory of Apex.
auth Authentication Library
components Components Library
container The dependency injection container.
debug Debugger
encrypt Encryption Library
installer Handles the initial installation of Apex after it is downloaded. This runs through the wizard, sets up the mySQL database and redis, etc.
log Log Handler
Network Handles various general repository communication such as retrieving a list of packages and themes, checking for available upgrades, and so on.