author-tagging-link.php

<?php $author = $page->author() ?>
<a href="<?php echo url('articles/author:' . urlencode($author)) ?>">all articles by <?php echo $author; ?></a>

author-tagging.php

<?php if(param('author')) {

  $author   = urldecode(param('author'));
  $articles = $pages->find('articles')
                    ->children()
                    ->visible()
                    ->filterBy($author)
                    ->flip()
                    ->paginate(10);

  echo '<h1>Author Archives: <em>' . $author . '</em></h1>';
  
} else {

  $articles = $pages->find('articles')
                    ->children()
                    ->visible()
                    ->flip()
                    ->paginate(10);
}

?>