It's worse than that -- "Recreating Raycast" is just the blog post title, the project is called "raycast-linux".

It's also worse than that. It uses the Raycast logo directly in the launcher itself. Which is odd because just above this, OP says:

"I've actually thought about that before; I've tried to be extremely clear in the project's README with a disclaimer that this is a non-commercial hobby project and is not affiliated with the official Raycast team in any way."

Clearly a bright kid, but that's quite a fumble. Among my ideas for being extremely clear about not being affiliated with Raycast I would have to say using their name and using their logo together would be the worst way to communicate that.

Oh dear. Yeah, that’s guaranteed to end badly.

OP: please do change this ASAP so that the Raycast gang doesn’t protest the really neat project you’ve made!