Post Title: Transform added for paragraph and heading

packages/block-library/src/post-title/edit.js

@@ -20,7 +20,6 @@ import { __ } from '@wordpress/i18n';
 import { createBlock, getDefaultBlockName } from '@wordpress/blocks';
 import { useEntityProp, store as coreStore } from '@wordpress/core-data';
 import { useSelect } from '@wordpress/data';
-
 export default function PostTitleEdit( {
 	attributes: { level, levelOptions, textAlign, isLink, rel, linkTarget },
 	setAttributes,
@@ -30,6 +29,7 @@ export default function PostTitleEdit( {
 	const TagName = level === 0 ? 'p' : `h${ level }`;
 	const isDescendentOfQueryLoop = Number.isFinite( queryId );
 	const userCanEdit = useSelect(
+		// eslint-disable-next-line no-shadow
 		( select ) => {
 			/**
 			 * useCanEditEntity may trigger an OPTIONS request to the REST API

packages/block-library/src/post-title/index.js

@@ -10,6 +10,7 @@ import initBlock from '../utils/init-block';
 import metadata from './block.json';
 import edit from './edit';
 import deprecated from './deprecated';
+import transforms from './transforms';
 
 const { name } = metadata;
 export { metadata, name };
@@ -18,6 +19,7 @@ export const settings = {
 	icon,
 	edit,
 	deprecated,
+	transforms,
 };
 
 export const init = () => initBlock( { name, metadata, settings } );

packages/block-library/src/post-title/transforms.js

@@ -0,0 +1,49 @@
+/**
+ * WordPress dependencies
+ */
+import { __ } from '@wordpress/i18n';
+import { createBlock } from '@wordpress/blocks';
+import { select } from '@wordpress/data';
+// eslint-disable-next-line import/no-extraneous-dependencies
+import { store as editorStore } from '@wordpress/editor';
+export const transforms = {
+	from: [
+		{
+			type: 'block',
+			blocks: [ 'core/heading', 'core/paragraph' ],
+			transform: ( attributes ) =>
+				createBlock( 'core/post-title', {
+					textAlign: attributes.align || undefined, // Map alignment if available
+				} ),
+		},
+	],
+	to: [
+		{
+			type: 'block',
+			blocks: [ 'core/heading' ],
+			transform: ( { textAlign } ) => {
+				const postTitle =
+					select( editorStore ).getEditedPostAttribute( 'title' ) ||
+					__( 'Add a title…' );
+				return createBlock( 'core/heading', {
+					content: postTitle,
+					align: textAlign,
+				} );
+			},
+		},
+		{
+			type: 'block',
+			blocks: [ 'core/paragraph' ],
+			transform: ( { textAlign } ) => {
+				const postTitle =
+					select( editorStore ).getEditedPostAttribute( 'title' ) ||
+					__( 'Add a title…' );
+				return createBlock( 'core/paragraph', {
+					content: postTitle,
+					align: textAlign,
+				} );
+			},
+		},
+	],
+};
+export default transforms;