[ealexhudson]

The reason is simple: it allows you to do the install using "sync" in all cases, whether the lockfile exists or not.

Where the lockfile doesn't exist, it creates it from whatever current is, and the lockfile then gets thrown away later. So it's equivalent to what you're saying, it just avoids having two completely separate install paths. I think it's the correct approach.

[stavros]

I don't understand, you can already run `uv sync` if the lockfile doesn't exist. It just creates a new one. Why do it explicitly, like here?