Presenting Lazuli, a REPL-Driven Development plug-in for Ruby 

Inspired by Clojure, and its own plug-in for the Atom/Pulsar editor, I decided to write a Ruby version called Lazuli.
It's an "almost-but-not-really fork" of Chlorine, a REPL-Driven Development plug-in for Clojure.
In this small video I show how to interact with a live Ruby process, evaluate code, and have some insights inside the editor, like "where was this method REALLY defined", even if it was defined dynamically.