By default, the Termux repos aren't updated with the latest packages, which is why the first command you should run is for a ...

But I’ve noticed that when I open everything all at once, I slip into a reactive mode before I’ve even decided what I actually need to work on. That was the problem I wanted to solve, so I wrote a ...

So why don't you run this simple command directly in your terminal? That's because you need to automate this setup. Otherwise running the command is easily forgotten when checking out your repository.