Add GitHub Pages Jekyll schema

[Nick2bad4u]

Summary

Adds a GitHub Pages-specific Jekyll configuration schema for _config.yml files used by sites built by GitHub Pages.

This schema builds on the existing generic jekyll.json schema and narrows the GitHub Pages-specific parts that are not valid or are hard-set in the Pages build environment:

• supported plugins / legacy gems values
• supported bundled theme values and remote_theme
• supported Markdown processors and syntax highlighters
• hard-set GitHub Pages values such as safe, lsi, incremental, gist.noscript, and selected kramdown values
• disallowed config fields that GitHub Pages controls, such as source, destination, and plugins_dir

The catalog entry intentionally omits fileMatch because the existing generic Jekyll schema already claims _config.yml; using the same broad filename would create an ambiguous association. Users can opt into this stricter schema with a YAML language-server schema directive when they need GitHub Pages validation.

Sources

• https://docs.github.com/en/pages/setting-up-a-github-pages-site-with-jekyll/about-github-pages-and-jekyll
• https://docs.github.com/en/pages/setting-up-a-github-pages-site-with-jekyll/setting-a-markdown-processor-for-your-github-pages-site-using-jekyll
• https://docs.github.com/en/pages/setting-up-a-github-pages-site-with-jekyll/adding-a-theme-to-your-github-pages-site-using-jekyll
• https://pages.github.com/versions/
• https://github.com/github/pages-gem/blob/master/lib/github-pages/configuration.rb
• https://github.com/github/pages-gem/blob/master/lib/github-pages/plugins.rb

Validation

• node .\cli.js check --schema-name=github-pages-jekyll.json
• npm run prettier -- --cache --ignore-unknown .\src\schemas\json\github-pages-jekyll.json .\src\api\json\catalog.json .\src\schema-validation.jsonc .\src\test\github-pages-jekyll\_config.yml .\src\test\github-pages-jekyll\remote-theme.yml .\src\negative_test\github-pages-jekyll\hardcoded-values.yml .\src\negative_test\github-pages-jekyll\unsupported-plugin.yml .\src\negative_test\github-pages-jekyll\unsupported-source.yml .\src\negative_test\github-pages-jekyll\unsupported-theme.yml

[hyperupcall]

Thanks

[Nick2bad4u]

Thanks

No problem.