Open Source

Here are a few open source projects I’ve been working on. You can find more at

Jet Black

A black-box testing utility for command line tools and gems. Written in Ruby, with RSpec in mind.

RSpec Overview

Get an overview of your RSpec test suite - handy when you're new to a codebase.


Cloud Foundry plugin to check application manifests before blue-green deployment. This helps prevent unexpected changes during deployments.


A Git hook to pre-populate commit messages with your story ID from Pivotal Tracker. Written in Go.


Polyline simplification library written in Ruby. Use this gem to reduce the number of points in a complex polyline / polygon. Ported from simplify.js


A Ruby gem for generating test doubles in Swift, allowing interactions to be verified and canned values to be returned. Inspired by Counterfeiter in Golang.