Oh, right. I read some comments below and figured that it takes JSON and dynamically renders the template client-side, which seems very unnecessary. Why not just generate HTML? Does Jekyll work that way too?

Punch generates static HTML pages using Mustache and JSON, which can be served from a server. Apart from that Punch's renderer can also be used on client-side to render dynamic content. This is elaborated with an example, in the blog post.

Sorry, I misinterpreted what Punch actually is. Maybe you could elaborate in "What is Punch" section that it uses node.js to generate HTML pages?

Thanks for the suggestion. I'll update "What is Punch" section with more elaboration.

And include a picture of a cat.