A Story of Continuous Integration

This document tells the story of how a class project evolved into a company with thousands of engineers and millions of lines of code using continuous integration practices over 15 years. It describes how the project started with manual code sharing and testing, then adopted version control and regular integration. It details how the company scaled up practices like automated builds, testing, and failure tracking to support growth from 2 people to thousands of engineers and over 200,000 tests while maintaining quality. The key takeaways are shortening feedback loops through practices like continuous integration, adopting principles like versioning everything and automating as much as possible, and having scalable solutions at each stage of growth.