Velo uses the include directive to import code from other files. Standard library modules live in the lang/ directory.
Use include to load other .vel files. Paths are relative to the current file.
include"lang/bool.vel"; # bool extension functionsTerminal term =newTerminal();
term.println(true.str); # "true"
Standard library modules are real Velo code you include to use. Native classes (Terminal, Time, Http, FileSystem, Socket) need no include — the runtime provides them.