Built for someone else to use.

The line between a project and a product is who it is built for. A project solves my problem; I am the only user it has to satisfy. A product is built so that someone else can solve theirs with it — which means a documented interface, defaults that work without me explaining them, and a maintainer who expects questions.

That distinction matters more than it sounds. Plenty of genuinely useful code is not a product, and calling it one implies support commitments I have not made.

Nothing here is a finished release. These are systems built with reuse as the intent, at the maturity each one states. Where something is early it says so, rather than implying availability that does not exist.