Meta
.slate-meta. A class and no element rule: the markup is a <p> or a <div> holding <time> and <a>, and neither of those two tags means "this is metadata": <address> comes closest and already means a document's contact details. Not operable itself; the links inside it are.
A meta link is a text underline rather than a bottom border, drawn in currentcolor so it reads as the same subtle tone as the text it belongs to and can take the module's own text-underline-offset and text-decoration-skip-ink, which a border-drawn hairline could not. Reached and followed exactly like any other link: Tab, then Enter.