File	Purpose	Required
APP/src/*.app.src	Application resource	At least one
APP/ebin/*.app	Compiled app resource	Alternative to .app.src
APP/src/*.app.src.script	Dynamic app resource	Alternative
APP/mix.exs	Elixir Mix project	Alternative
APP/rebar.config	App-specific config	No

Directory Pattern	Purpose
lib_dirs/*	Find application directories
*/src/, */lib/	Search for app resources
*/ebin/	Search for compiled apps