rye is also written in Rust and it's being replaced by uv.

From its homepage: https://rye.astral.sh/

> If you're getting started with Rye, consider uv, the successor project from the same maintainers.

> While Rye is actively maintained, uv offers a more stable and feature-complete experience, and is the recommended choice for new projects.

> Having trouble migrating? Let us know what's missing.

It's also Rust.