This is a well written article.

Apologies if this turns out not to be true, because I am reading on my mobile phone. I linked over and peaked at the source and it doesn’t look fantasyland compatible. If true, what was the rationale for not matching that spec? There seems to be overlap with some libs, such as sanctuary, but crocks offers some differentiated features/functions. This makes it a challenge to integrate with projects already leveraging fantasy types.