ie, does https://luminusweb.com/ (or it's successor Kit, https://kit-clj.github.io/) includes batteries? They provide integrated solutions with templating, database access, authentication, and other common web application components pre-configured.

It's one of those weasel phrases that is poorly defined and has unclear boundaries.

I think Python first used it for the entire ecosystem:

  'The Python source distribution has long maintained the philosophy of "batteries included" -- having a rich and versatile standard library which is immediately available, without making the user download separate packages. This gives the Python language a head start in many projects.' 

So anything which doesn't require downloading separate packages, and provides a rich and versatile standard library is "batteries included"? Hugo in Golang, or Jekyll in Python are certainly batteries included then. Should all of them add this to their strapline?

The distinction becomes less clear when frameworks offer plugin ecosystems or when they're built atop other "batteries included" platforms. This creates a spectrum rather than a binary classification, leaving me quite skeptical of this adoption of marketing language.