Add a Custom Block Style
Registers extra style variations for core blocks, such as an "Outline" button and a "Card" group, that editors can pick in the block sidebar.
Snippet Library
Developer snippets for WordPress
Snippets for developers: debugging helpers, custom cron schedules, body classes, REST API tweaks and admin tools for checking hooks and queries. Building blocks for people who write code for WordPress every day.
Expose a Custom Field in the REST API and Block Editor
Registers a post meta field (a subtitle by default) so it is saved safely, available in the REST API and usable by the block editor and block bindings.
Offer Custom Image Sizes in the Editor
Adds your registered custom image sizes to the size dropdown in the block editor and media modal, so editors can pick them when inserting images.