I knew I was going to write readline, and I knew I was going to write it as a library. I wrote the vast majority of it on a weekend after I had a working shell

I knew I was going to write readline, and I knew I was going to write it as a library. I wrote the vast majority of it on a weekend after I had a working shell. POSIX was mostly me telling David Korn that just because he had created a shitty user interface feature, we shouldn't be required to make that part of the specification.