How is JReadline different from Jline1/2?

The JReadline started out of some of the shortcomings of Jline and its API is somewhat similar for getting output from console. Completion/Settings/etc is howevery different but changing from Jline to JReadline should not require much work.

I found an issue, where can I report it?

Create an issue in the issue tracker

How can I contribute to JReadline?

More generally, see this