[dEnigma]

So by "character mutation" you mean the deletion of characters? Because to my ears that term still sounds like bit flips, i.e. changing characters.

[jonahx]

https://codegolf.stackexchange.com/questions/tagged/radiatio...

[tedunangst]

> This tag is for challenges which require answers to still work when a random edit to the source code is made.

What if my random edit is to add a character?

[jonahx]

Possible -- depends on the rules of the specific challenge. Most of the time it's edits, deletes, or some combination. Sometimes the score depends on how many edits your code can withstand.