It is not new, but also not ubiquous enough to express something everyone understands.

Trying to get "forge" across as some kind of defacto term just adds noise to the product description, I think.

I also knew it but look at the number of comments saying "what is a forge?" here - it's clearly not a good description.

Once upon a time, a lot of software was released/available through "source forge", which is pretty self-explanatory in the context of software publishing. Then a decade ago, SourceForge shit the bed and destroyed its reputation. I'd bet that most of the developers saying they've never heard of "forge" in this context have entered in the industry in that time.