I also don't _love_ vibe coding and do it just for exploration/recreation, but I also have long thought an LLM trained and tuned specifically for a language that is best for LLMs might be ideal.

Currently, using Claude to vibe code Rust is _much_ more hit-or-miss than using it for Python... so Python has become the lingua franca or IR I use with it.

Often I'll ask Claude to implement something in Python, validate and correct the implementation, and in a separate session ask it to translate it from Python to Rust (with my requirements). It often helps.

Claude is particularly bad at hallucinating the APIs of Crates, something it does a lot less for python.