Why is the components directory ignored in the Biome config file?

I can see that ultracite was added by the creator of it (Hayden Bleasel) himself, what I don't understand is why are shadcn files ignored?

Is there a particular reason for it?

<img width="886" height="372" alt="screenshot of biome.jsonc file, showing that component directory is ignored" src="https://github.com/user-attachments/assets/6b600e36-1c90-4501-9a85-54501a3fbddc" />