It knows about Svelte 5 for some time, but it particularly likes to mix it with Svelte 4 in very weird and broken ways.

I have experienced this for various libraries. I think it helps to paste in a package.json in the prompt.

All the models seem to struggle with React three fiber like this. Mixing and matching versions that don't make sense. I can see this being a tough problem given the nature of these models and the training data.

I am going to also try to start giving it a better skeleton to start with and stick to the particular imports when faced with this issue.

My very first prompt with claude 4 was for R3F and it imported a depreciated component as usual.

We can't expect the model to read our minds.

Or worse yet, React!