Isn't it Rye ? (https://rye.astral.sh)

"Rye supports two systems to manage dependencies: uv and pip-tools. It currently defaults to uv"

I've been evaluating it lately and it has pretty much the same CLI commands as Poetry except it's faster and comes with complete Python interpreter management (which is to me the real killer feature as I don't really care about speed of dependency resolution, but I do care about the DX).

Yeah, that's definitely within scope for what we're trying to build, and we've been hard at work on extending uv to support those workflows (platform-agnostic resolution, lockfiles, etc.). Honestly, a lot of it is already implemented, but not yet stabilized or announced. Coming soon.