@@ -81,6 +81,30 @@ function wp_revisions_are_globally_supported() {
 	return 0 !== (int) WP_POST_REVISIONS;
 }
 
+/**
+ * Determines whether real-time collaboration is disabled for a post type.
+ *
+ * @since 7.1.0
+ *
+ * @param string $post_type Post type name.
+ * @return bool Whether real-time collaboration is disabled for the post type.
+ */
+function wp_is_post_type_collaboration_disabled( $post_type ) {
+	if ( ! post_type_exists( $post_type ) ) {
+		return true;
+	}
+
+	/**
+	 * Filters whether real-time collaboration is disabled for a post type.
+	 *
+	 * @since 7.1.0
+	 *
+	 * @param bool   $disabled  Whether real-time collaboration is disabled for the post type.
+	 * @param string $post_type Post type name.
+	 */
+	return (bool) apply_filters( 'wp_is_post_type_collaboration_disabled', false, $post_type );
+}
+
 /**
  * Injects the real-time collaboration setting into a global variable.
  *
@@ -103,9 +127,17 @@ function wp_collaboration_inject_setting() {
 		$enabled = false;
 	}
 
+	$disabled_post_types = array_values(
+		array_filter(
+			get_post_types( array( 'show_in_rest' => true ) ),
+			'wp_is_post_type_collaboration_disabled'
+		)
+	);
+
 	wp_add_inline_script(
 		'wp-core-data',
-		'window._wpCollaborationEnabled = ' . wp_json_encode( $enabled ) . ';',
+		'window._wpCollaborationEnabled = ' . wp_json_encode( $enabled ) . ';' .
+		'window._wpCollaborationDisabledPostTypes = ' . wp_json_encode( $disabled_post_types ) . ';',
 		'after'
 	);
 }