Playbook
Implementation
https://thoughtbot.com/playbook/implementation/READMEThe majority of our development practices were first detailed in Kent Beck's classic Extreme Programming Explained: Embrace Change and in Gerald Weinberg's The Psychology of Computer Programming. We've tried its practices and found that using most of the practices most of the time improves the quality of our work and happiness of our team.
Some of our work is very technical, such as our Git protocol for feature branches, or our designers' approach to CSS. Look in our public thoughtbot/guides GitHub repo for that kind of information.