Added in 1.9.1
/halt
Halts a script and prevents any further processing.
If used in a event with ^ prefix, will stop AdiIRC from showing the default text for that event.
Example
alias example { ; Echo 'some text!'. /echo -a Some text! ; Halt the script. /halt ; Echo some more text, but this line will never be executed. /echo -a This echo command will never execute }