As of July 12018, Edit the Text is no longer available, so SETTI no longer has a purpose.
However, if you're still interested in Edit the Text, check out the ETT clone by Tikolu. More information can be found here.
UPDATE: A compatibility library has been made that allows you to run most old SETTI bots on the new ETT. Check it out here.
SETTI is a library which makes it easier to make bots for Edit the text.
More information can be found on the Wiki.