Opening with "there are at least five python lock formats pre-existing" then proposes a 6th. I'd like to know if poetry, uv, etc are willing to adopt this before going forward otherwise we're just splitting the community further.

That said, I do think having reproducible builds as an explicit goal is important here, as several pre-existing formats like requirements.txt are too lax on that front.

pip, PDM, and uv already support PEP751 [0] and were involved in the design process.

[0]: https://discuss.python.org/t/community-adoption-of-pylock-to...