+// If the upgrade hasn't run yet, assume link manager is used.
+add_filter( 'default_option_link_manager_enabled', '__return_true' );
+
+// This option no longer exists; tell plugins we always support auto-embedding.
+add_filter( 'default_option_embed_autourls', '__return_true' );
+
+// Default settings for heartbeat
+add_filter( 'heartbeat_settings', 'wp_heartbeat_settings' );
+
+// Check if the user is logged out
+add_action( 'admin_enqueue_scripts', 'wp_auth_check_load' );
+add_filter( 'heartbeat_send', 'wp_auth_check' );
+add_filter( 'heartbeat_nopriv_send', 'wp_auth_check' );
+
+// Default authentication filters
+add_filter( 'authenticate', 'wp_authenticate_username_password', 20, 3 );
+add_filter( 'authenticate', 'wp_authenticate_spam_check', 99 );
+add_filter( 'determine_current_user', 'wp_validate_auth_cookie' );
+add_filter( 'determine_current_user', 'wp_validate_logged_in_cookie', 20 );
+