A perfect comment system in 1 line of HTML 

<a href="mailto:foo@example.com">Post a comment</a>

(that said, gosh darnit I really need to build a better comment system for my site. as always I have ideas about how to do it as a Flask module or something, but you’d think after over 20 years of this stuff there’d be at least one embeddable comment system that wasn’t critically flawed in some way…)