FillPouch

I was searching for a way to separate content from "dressing up the content" -- and still be a holistic approach to website design. I wanted something that can start with content written using plain HTML or markdown, and then insert the content into the right places in a well dressed website. Or do the other way around - where I know how the design ought to look, insert placeholders for the content which I then fill later. Basically support all kinds of web-design iterations when one proceeds with a design from very hazy stages to final stages. I also did not want to get into using NPM and other external tools just to get a website going. All this motivated me to write FillPouch. It has just been launched as a freeware. This was coded in an esoteric language called Visual Prolog whose compiler is unfortunately not available anymore. (I am an old time legal user of the language) So currently it can't be open-sourced. I am searching earnestly for feedback. Thanks!