By default, both Markdown field and HTML field is available for Bolt CMS, but sanitation is done before inserting into the database, making rendering of certain elements impossible; especially, for those starting with < (Unless you use <).
But certain markdown specification requires this, e.g.
- <URL> as a shorthand for [URL](URL)
Also,
<?php
// code goes here
Also, ability to customize markdown might lead to custom markdown specification... e.g. Furigana and Adding classes to markdown.
Anyway, I made this for the time being for <.