This was a live-coding artifact from my talk "Dispelling the Dark Magic: Inside a Ruby Debugger", given at RubyConf 2017.
The mini_debug.rb file contains a simple debugger written during the talk. The greet.rb file is a toy program used to demo the debugger.
Code is copyright Google, Inc. and licensed under the Apache 2.0 license. See the LICENSE file at the repository root for details.