@@ -0,0 +1,3 @@
+https://github.com/WordPress/wordpress-develop/pull/13453
+
+* https://github.com/WordPress/gutenberg/pull/82634
@@ -80,7 +80,8 @@ npm ci
 status "Generating build... 👷‍♀️"
 npm run build
 
-# Only including public icons when building for WordPress Core.
+# Only including icons shipped to WordPress Core when building for it. An icon is shipped when its
+# manifest entry carries a `public` property, whether that property is `true` or `false`.
 #
 # This runs before creating the archive but after the build so icon collection validation passes as expected. Plugin
 # builds keep the full library.
@@ -89,7 +90,7 @@ if [ "$IS_WORDPRESS_CORE" = "true" ]; then
 	(
   	cd packages/icons/src
   	non_public_icons=$(comm -13 \
-  		<(jq -r "map(select(.public) | .filePath)[]" manifest.json | sort) \
+  		<(jq -r "map(select(.public != null) | .filePath)[]" manifest.json | sort) \
   		<(ls library/*.svg))
   	echo "$non_public_icons" | sed 's|^|  Deleting packages/icons/src/|'
   	echo "$non_public_icons" | xargs rm
 
@@ -80,6 +80,10 @@ protected function __construct() {}
 	 *                             If not provided, the content will be retrieved from the `file_path` if set.
 	 *                             If both `content` and `file_path` are not set, the icon will not be registered.
 	 *     @type string $file_path Optional. The full path to the file containing the icon content.
+	 *     @type bool   $public    Optional. Whether the icon is exposed through the REST API, and
+	 *                             therefore selectable in the editor's Icon block. Non-public icons
+	 *                             stay available to server-side code via {@see wp_get_icon()}.
+	 *                             Default true.
 	 * }
 	 * @return bool True if the icon was registered with success and false otherwise.
 	 */
@@ -122,7 +126,7 @@ public function register( $icon_name, $icon_properties ) {
 			return false;
 		}
 
-		$allowed_keys = array_fill_keys( array( 'label', 'content', 'file_path' ), 1 );
+		$allowed_keys = array_fill_keys( array( 'label', 'content', 'file_path', 'public' ), 1 );
 		foreach ( array_keys( $icon_properties ) as $key ) {
 			if ( ! array_key_exists( $key, $allowed_keys ) ) {
 				_doing_it_wrong(
@@ -160,6 +164,15 @@ public function register( $icon_name, $icon_properties ) {
 			return false;
 		}
 
+		if ( isset( $icon_properties['public'] ) && ! is_bool( $icon_properties['public'] ) ) {
+			_doing_it_wrong(
+				__METHOD__,
+				__( 'Icon public property must be a boolean.', 'gutenberg' ),
+				'7.2.0'
+			);
+			return false;
+		}
+
 		if (
 			( ! isset( $icon_properties['content'] ) && ! isset( $icon_properties['file_path'] ) ) ||
 			( isset( $icon_properties['content'] ) && isset( $icon_properties['file_path'] ) )
@@ -352,6 +365,9 @@ public static function get_instance() {
 					} else {
 						continue;
 					}
+					if ( isset( $icon['public'] ) ) {
+						$icon_properties['public'] = $icon['public'];
+					}
 					$gutenberg_registry->register( $icon['name'], $icon_properties );
 				}
 			}
 
@@ -116,6 +116,9 @@ public function get_items( $request ) {
 		$icons    = WP_Icons_Registry::get_instance()->get_registered_icons( $search );
 
 		foreach ( $icons as $icon ) {
+			if ( false === ( $icon['public'] ?? true ) ) {
+				continue;
+			}
 			if ( null !== $collection && ( ! isset( $icon['collection'] ) || $icon['collection'] !== $collection ) ) {
 				continue;
 			}
@@ -126,6 +129,33 @@ public function get_items( $request ) {
 		return rest_ensure_response( $response );
 	}
 
+	/**
+	 * Retrieves a specific icon from the registry.
+	 *
+	 * Icons registered as non-public are reported as not found. Icons registered
+	 * without an explicit `public` property are public.
+	 *
+	 * @param string $name Icon name.
+	 * @return array|WP_Error Icon data on success, or WP_Error object on failure.
+	 */
+	public function get_icon( $name ) {
+		$icon = parent::get_icon( $name );
+
+		if ( ! is_wp_error( $icon ) && false === ( $icon['public'] ?? true ) ) {
+			return new WP_Error(
+				'rest_icon_not_found',
+				sprintf(
+					// translators: %s is the name of any user-provided name
+					__( 'Icon not found: "%s".', 'gutenberg' ),
+					$name
+				),
+				array( 'status' => 404 )
+			);
+		}
+
+		return $icon;
+	}
+
 	/**
 	 * Prepare a raw icon before it gets output in a REST API response.
 	 *
 
@@ -52,6 +52,10 @@ function wp_unregister_icon_collection( $slug ) {
 	 *                             If not provided, the content will be retrieved from the `file_path` if set.
 	 *                             If both `content` and `file_path` are not set, the icon will not be registered.
 	 *     @type string $file_path Optional. The full path to the file containing the icon content.
+	 *     @type bool   $public    Optional. Whether the icon is exposed through the REST API, and
+	 *                             therefore selectable in the editor's Icon block. Non-public icons
+	 *                             stay available to server-side code via {@see wp_get_icon()}.
+	 *                             Default true.
 	 * }
 	 * @return bool True if the icon was registered successfully, else false.
 	 */
@@ -131,13 +135,16 @@ function gutenberg_register_default_icons() {
 			return;
 		}
 
-		wp_register_icon(
-			'core/' . $icon_name,
-			array(
-				'label'     => $icon_data['label'],
-				'file_path' => $icons_directory . $icon_data['filePath'],
-			)
+		$icon_args = array(
+			'label'     => $icon_data['label'],
+			'file_path' => $icons_directory . $icon_data['filePath'],
 		);
+
+		if ( isset( $icon_data['public'] ) ) {
+			$icon_args['public'] = $icon_data['public'];
+		}
+
+		wp_register_icon( 'core/' . $icon_name, $icon_args );
 	}
 }
 
 
@@ -9,6 +9,8 @@
 ### Enhancements
 
 -   Redraw a further 141 icons as stroke-based for variable stroke-width support, following the convention introduced in [#78808](https://github.com/WordPress/gutenberg/pull/78808), and refine the already stroke-based `image` drawing. Most retain their original footprint; the table icons, `capturePhoto` and `image` are slightly smaller by design. ([#82540](https://github.com/WordPress/gutenberg/pull/82540))
+-   `manifest.json`: The `public` property is now a tri-state. Omitting it keeps an icon in the JS library only; `true` ships it to WordPress Core and exposes it through the icons REST API, making it selectable in the Icon block; `false` ships it and registers it in the `core` collection for server-side use via `wp_get_icon()`, while hiding it from the REST API and the Icon block. ([#82634](https://github.com/WordPress/gutenberg/pull/82634))
+-   The `wordpress` icon now ships to WordPress Core as a non-public icon: it is registered in the `core` collection and stays available to server-side code via `wp_get_icon( 'core/wordpress' )`, but is not exposed through the icons REST API and is not selectable in the Icon block. ([#82634](https://github.com/WordPress/gutenberg/pull/82634))
 
 ### Bug Fixes
 
 
@@ -50,7 +50,10 @@ To add a new icon to the library, follow these steps:
    - `slug`: The icon identifier (should match the SVG filename without the `.svg` extension)
    - `label`: The human-readable label for the icon. Use Title Case (for example, `My New Icon`).
    - `filePath`: The relative path to the SVG file (e.g., `library/my-new-icon.svg`)
-   - `public` (optional): Set to `true` if you want to expose this icon as a core icon through the SVG Icons API. **Important**: Once an icon is made public, removing it is difficult, so carefully consider whether to make it public before setting this field to `true`.
+   - `public` (optional): Controls whether the icon is shipped to WordPress core, and if so how far it is exposed. **Important**: Once an icon ships, removing it is difficult, so carefully consider this field before setting it.
+     - Omit the field to keep the icon in the JS library only. It is not shipped to core.
+     - `true` ships the icon to core and exposes it through the SVG Icons API, which makes it selectable in the Icon block.
+     - `false` ships the icon to core and registers it for server-side use through `wp_get_icon()`, but hides it from the REST API and the Icon block. Use this for icons that belong to the admin UI rather than to post content, such as admin menu icons.
 4. **Do not edit `manifest.php`**: The `manifest.php` file is automatically generated from `manifest.json` by the build script. Do not edit it manually, as your changes will be overwritten when the build runs.
 
 After adding your icon, run `npm run build` to generate the TypeScript files and update `manifest.php`.
 
@@ -43,9 +43,12 @@ function generatePHPArray( manifest ) {
 		const label = escapePHPString( item.label );
 		const filePath = escapePHPString( item.filePath );
 
+		const publicEntry =
+			item.public === false ? "\n\t\t'public'   => false," : '';
+
 		return `${ key } => array(
 		'label'    => _x( '${ label }', 'icon label', 'gutenberg' ),
-		'filePath' => '${ filePath }',
+		'filePath' => '${ filePath }',${ publicEntry }
 	),`;
 	} );
 
@@ -56,20 +59,22 @@ ${ phpEntries.join( '\n' ) }
 
 /**
  * Generates manifest.php from manifest.json.
- * Only includes icons with public: true.
+ * Only includes icons which have the `public` key set.
  */
 async function generateManifestPHP() {
 	const manifestJson = await readFile( MANIFEST_JSON_PATH, 'utf8' );
 	const manifest = JSON.parse( manifestJson );
-	const publicIcons = manifest.filter( ( item ) => item.public === true );
+	const includedIcons = manifest.filter(
+		( item ) => typeof item.public === 'boolean'
+	);
 	const phpHeader = `<?php
 // This file is automatically generated. Do not edit directly.
 if ( ! defined( 'ABSPATH' ) ) {
 	die( 'Silence is golden.' );
 }
 
 `;
-	const phpArray = generatePHPArray( publicIcons );
+	const phpArray = generatePHPArray( includedIcons );
 	const phpContent = phpHeader + phpArray + '\n';
 	await writeFile( MANIFEST_PHP_PATH, phpContent, 'utf8' );
 }
 
@@ -13,6 +13,7 @@ function isStrokeBasedSvg( svgContent ) {
  * Validating the icons collection checks that:
  *
  * - Each manifest entry has a matching SVG in library/, and vice versa.
+ * - Each manifest entry's `public` property, if present, is a boolean.
  * - Each SVG uses currentColor so icons inherit text color.
  * - Each SVG uses viewBox="0 0 24 24".
  * - Each stroke-based SVG contains at least one stroked graphical element.
@@ -60,6 +61,19 @@ async function validateCollection() {
 
 		manifestPaths.push( icon.filePath );
 
+		/*
+		 * Verify that `public`, if present, is a boolean.
+		 */
+		if ( 'public' in icon && typeof icon.public !== 'boolean' ) {
+			problems.push(
+				`- Invalid icon definition for icon '${
+					icon.slug
+				}': expected 'public' to be true or false, saw ${ JSON.stringify(
+					icon.public
+				) }`
+			);
+		}
+
 		/*
 		 * Verify that the corresponding SVG file is found.
 		 */
 
@@ -1790,6 +1790,7 @@
 	{
 		"slug": "wordpress",
 		"label": "WordPress",
-		"filePath": "library/wordpress.svg"
+		"filePath": "library/wordpress.svg",
+		"public": false
 	}
 ]
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+https://github.com/WordPress/wordpress-develop/pull/13453`
	`2`	`+`
	`3`	`+* https://github.com/WordPress/gutenberg/pull/82634`
Original file line number	Diff line number	Diff line change
`@@ -1790,6 +1790,7 @@`
`1790`	`1790`	`{`
`1791`	`1791`	`"slug": "wordpress",`
`1792`	`1792`	`"label": "WordPress",`
`1793`		`- "filePath": "library/wordpress.svg"`
	`1793`	`+ "filePath": "library/wordpress.svg",`
	`1794`	`+ "public": false`
`1794`	`1795`	`}`
`1795`	`1796`	`]`