Stop writing CLI validation. Parse it right the first time
I have this bad habit. When something annoys me enough times, I end up building a library for it. This time, it was CLI validation code. See, I spend a lot of time reading other people's code. Open source projects, work stuff, random GitHub repos I stumble upon at 2 AM. And I kept noticing this thing: every CLI tool has the same ugly validation code tucked away somewhere. You know the kind: if ( ! opts . server && opts . port ) { throw new Error ( " --port requires --server flag " ); } if ( op