Ask HN: Link to script to minimize many file types

Hi, couple of weeks ago I saw here a link to a script that was able reduce the file size of many file types but I cannot find it again. Could anyone point me to that script? The script would process all files in a folder structure and then replace them with smaller files by converting e.g. mp3's into ogg, png into webp, and so on. It would also call other tools to reduce file size such as pdf tools for example. It was called minimism or similar I think. Thank you and regards, Rob