FWIW I immediately thought of the ML architecture, not the toy or electrical device. HN is very ML-heavy these days, and in that context 'transformers' has a familiar and obvious meaning.

Same here: i was wondering if he had implemented some autobots in the kids programming language Scratch.

Because that would seriously be awesome.

I, too, thought it was the former, but the toy geek in me hoped for the latter. To my surprise it was neither.

I think the top level domain of the author's blog kinda gives it away :)

Huh? The website's TLD is NL not ML. (And I'll also chime in to say that I thought it was either electrical transformers or 3D printed transformers toys).

Oh wow, my sight must be poor since I honestly thought it was .ml.