This site makes a big point of using the term "RESTful" repeatedly, but it seems to be JSON-based by default?
I don't know why modern web frameworks insist on continuing to misuse or misapply the term despite a fairly large amount of messaging recently about how exactly this term is misapplied, and the resurgence of frameworks and tools that do correctly apply it, e.g. HTMX, Datastar, Alpine AJAX.
Otherwise, this looks cool. I'd encourage you to un-roll-your-own docs and use something like Starlight or Docusaurus so you can have usable search and versioned docs.
What’s with the pivot away from the purely speed based testing? I recall getting the ick when I saw it as your primary metric for engineer goodness not too long ago and I don’t see any mention of it anymore on your site. Have you pivoted to something more sane?