What's included in Full Site Editing?
FSE includes the Site Editor (editing templates and template parts), the Style Editor (global colors, typography, spacing), block templates for pages and archive pages, and Block Patterns as reusable layouts. Everything is based on the Gutenberg block system.
FSE vs. classic theme customization
Classic WordPress themes use PHP templates and the Customizer. FSE block themes replace PHP templates with HTML files containing block markup and replace the Customizer with the visual Site Editor. FSE themes are more portable and easier to maintain — but not all plugins are compatible with the old Customizer system.
AI and Full Site Editing
anipage.io generates Gutenberg block markup that is fully compatible with FSE block themes. Generated pages can be used directly in FSE-based themes. The AI handles the creation of the block structure — you can then adjust global styles in the Site Editor.