Building apps over time, I found some work that needs to be done on every application: Authentication, Authorization, Mailers, etc. I started extracting this standard functionality into a Rails engine a few years ago. Later, tailwindscss, hotwire, stimulus, and phlex entered the picture, so I started the engine again with reusable UI patterns that take advantage of these tools. This is how Maquina was born. https://mariochavez.io/desarrollo/2023/08/08/maquina-the-engine-for-rails/