The Moment Every Developer Dreads

Imagine this.

It's 11 PM. You've been heads-down on a feature for hours. Everything was working — and then you make one small change. Just a tweak. Nothing major.

And suddenly, everything breaks.

The app won't run. The code looks foreign. You can't even remember what it looked like ten minutes ago. You start frantically pressing Ctrl+Z, but it's not enough.