diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/blocks/heading/block.json
--- a/wp/wp-includes/blocks/heading/block.json	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/blocks/heading/block.json	Fri Sep 05 18:40:08 2025 +0200
@@ -1,6 +1,6 @@
 {
 	"$schema": "https://schemas.wp.org/trunk/block.json",
-	"apiVersion": 2,
+	"apiVersion": 3,
 	"name": "core/heading",
 	"title": "Heading",
 	"category": "text",
@@ -12,10 +12,9 @@
 			"type": "string"
 		},
 		"content": {
-			"type": "string",
-			"source": "html",
+			"type": "rich-text",
+			"source": "rich-text",
 			"selector": "h1,h2,h3,h4,h5,h6",
-			"default": "",
 			"__experimentalRole": "content"
 		},
 		"level": {
@@ -29,8 +28,10 @@
 	"supports": {
 		"align": [ "wide", "full" ],
 		"anchor": true,
-		"className": false,
+		"className": true,
+		"splitting": true,
 		"color": {
+			"gradients": true,
 			"link": true,
 			"__experimentalDefaultControls": {
 				"background": true,
@@ -38,24 +39,32 @@
 			}
 		},
 		"spacing": {
-			"margin": true
+			"margin": true,
+			"padding": true,
+			"__experimentalDefaultControls": {
+				"margin": false,
+				"padding": false
+			}
 		},
 		"typography": {
 			"fontSize": true,
 			"lineHeight": true,
+			"__experimentalFontFamily": true,
 			"__experimentalFontStyle": true,
 			"__experimentalFontWeight": true,
 			"__experimentalLetterSpacing": true,
 			"__experimentalTextTransform": true,
+			"__experimentalTextDecoration": true,
+			"__experimentalWritingMode": true,
 			"__experimentalDefaultControls": {
-				"fontSize": true,
-				"fontAppearance": true,
-				"textTransform": true
+				"fontSize": true
 			}
 		},
-		"__experimentalSelector": "h1,h2,h3,h4,h5,h6",
 		"__unstablePasteTextInline": true,
-		"__experimentalSlashInserter": true
+		"__experimentalSlashInserter": true,
+		"interactivity": {
+			"clientNavigation": true
+		}
 	},
 	"editorStyle": "wp-block-heading-editor",
 	"style": "wp-block-heading"