Content is managed via various files in the content/ folder: Markdown files, CSV files, JSON files. The main content is written away in a file content/main.md which then includes other files by using custom tags:
{% file=foobar.csv parser="AwesomeList\Parser\GenericCsvList" %}
When generating the content, the parser class is instantiated with the file as an argument. Next, the parser returns Markdown content, which then replaces the tag. The end result of this parsed content/main.md file is written to the main README.md in the root of this repository, thus forming the Awesome List.
To generate content, check out this repository. Next, run composer install. Next, run the script generate.php.