Gojekyll doesn't include¹ an extensible plugin system, and won't for the foreseeable future.
The functionality of some plugins is built into the core program:
| Plugin | Motivation | Basic Functionality | Missing Features |
|---|---|---|---|
| jekyll-avatar | GitHub Pages² | ✓ | |
| jekyll-coffeescript | GitHub Pages | ||
| jekyll-default-layout | GitHub Pages | ✓ | |
| jekyll-feed | GitHub Pages | ✓ | |
| jekyll-gist | core³ | ✓ | noscript |
| jekyll-github-metadata | GitHub Pages | some | |
| jekyll-live-reload | core | ✓ (always enabled) | |
| jekyll-mentions | GitHub Pages | ✓ | |
| jekyll-optional-front-matter | GitHub Pages | ||
| jekyll-paginate | core | ||
| jekyll-readme-index | GitHub Pages | ||
| jekyll-redirect_from | GitHub Pages | ✓ | user template |
| jekyll-relative-links | GitHub Pages | ||
| jekyll-sass-converter | core | ✓ (always enabled) | |
| jekyll-seo_tag | GitHub Pages | ✓ | SEO and JSON LD are not fully populated; site? and other tag parameters |
| jekyll-sitemap | GitHub Pages | ✓ | file modified dates⁴ |
| jemoji | GitHub Pages | ✓ | image tag fallback |
¹ (1) The code and internal APIs are too immature for this; and (2) The natural way of implementing this only works on Linux.
² https://pages.github.com/versions/
³ “Core” plugins are referenced in the main Jekyll documentation. The Jekyll documentation Official Plugins / #Official tag of Awesome Jekyll Plugins look dated; I didn't use those.
⁴ These don't seem that useful with source control and CI. (Post dates are included.)