See my blog post for background on this project.
Anthropic now have an official repository for Claude skills here:
https://github.com/anthropics/skills
The files that were previously archived in this repository can be found here:
https://github.com/anthropics/skills/tree/83291af582d21f5418854fa628a76686203c2f7a/document-skills
Created by prompting Claude.ai:
Create a zip file of everything in your /mnt/skills folder