When installing the **Chirpy** theme through [RubyGems][gem], Jekyll can only read files in the folders `_includes`, `_layout`, `_sass` and `assets`, as well as a small part of options of the `_config.yml` file from the theme's gem. (You can find the gem files by using the command `bundle info --path jekyll-theme-chirpy`). To fully use all the features of **Chirpy**, you need to copy the other critical files/directories from the theme's gem to your Jekyll site.
As the version upgrades, the critical files and configuration options will change. Please refer to the [Upgrade Guide](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide) to keep your website files in sync with the latest version of the theme.