When I learned lean software development, I abandoned year-long planning at work and at home. This year, I broke my rule. I made a New Year’s resolution. I decided to broaden my skills so I could ship a full-stack enterprise web app completely on my own. No back-end developers, no product managers, no UI designers, and no vibe coding. Since I wrote Ruby years ago and Rails is having a Renaissance right now, I wrote down the following and taped it to my bedroom door: In 2025, Kerrick is a Full-Stack Programmer Develop & deploy Ruby on Rails apps, covered by automated tests, to real users. I cracked open the newest edition of “The Pickaxe,” devoured Agile Web Development With Rails 7, re-read The Well-Grounded Rubyist, pre-ordered The Rails 8 Way, and acquired Effective Testing with RSpec 3. I love learning from books—reading, reflection and elaboration, cross-referencing, memorization, and application…