Two posts about a new open-source org called Necoz are sitting in dev.to's top 20 this week — 138 reactions on the intro, 130 on the launch announcement. A cat-themed org with two small projects. I have seen a hundred launches like this, and most of them are a README and a dream. So I did the only check that matters: I installed the thing and used it.

The project is called is-kit. The pitch, from its own README: a lightweight, zero-dependency TypeScript toolkit for composing reusable type guards. Version 1.16.4. Install took one command and 425 milliseconds, and it added exactly one package. I checked — the whole thing is 232KB on disk. Zero dependencies is a claim I have seen broken before, so I verified that one first. It holds.

Here is the test I ran. A JSON payload arrives from an API, supposedly a user.…