trunk
Block Supports: Guard against non-string attribute values to avoid fatal errors (#80501)
Notes: fix the mention notification email composition (#81187)
Dashboard Widgets: add icon and relevance to the widget action envelope (#81275)
Media: Cover client-side big image scaling and orphaned files (#81061)
Docs: fix broken release process links (#74250)
Add custom CSS support for individual block instances (#73959)
Plugin: Bump minimum required WordPress version to 6.6 (#67117)
Fix missing return value in force_filtered_html_on_import footnotes filter (#81293)
Duotone: Use HTML API class_list for duotone wrapper class handling (#79531)
Icons: Store the sanitized SVG content when registering an icon (#80508)
Site Export: ensure that the export endpoint uses Gutenberg theme classes (#61561)
Global Styles: Reject non-string custom CSS in the REST controller (#80338)
Icons: Unify collection-scoping route param on `collection` and validate description (#80113)
Fix `@since` tag in docblock in `WP_Theme_JSON_Data_Gutenberg`. (#62425)
Style states: Fix phantom pseudo element style output (#81291)
Code Modernization: Replace isset() checks with null coalescing operator (#75425)
Fix: use WP_Theme_JSON_Gutenberg instead of WP_Theme_JSON class (#74294)
Add wp-theme as a style dependency of wp-components (#80362)
Experiments: Move screen under Settings, drop top-level Gutenberg menu and Demo page (#79456)
Classic Themes: Enable Fonts and thus global styles (#73971)
Experiments: Shorten the plugin settings page name (#79579)
Docs: Standardize use of @link tag for URL references in lib directory (#74984)
Remove content types experiment (#81340)
Add math block and rich text format (#72182)
Navigation overlay: remove experiment (#74968)
Connectors: Update page identifier to options-connectors (#76142)
Icons: Override WP_Icons_Registry singleton with Gutenberg icons registry (#76455)
Sync changes from `wp_enqueue_global_styles()` to Gutenberg override (#76127)
Dimensions Support: Add dimension presets and adopt for width and min height block supports (#73811)
Button: turn on the width setting by default in theme.json (#81196)
RTC: Change RTC option name (#76643)