Sure thing, I'm not even sure when the files got formatted 😅

I know it's failing as of my last commit. Currently trying to figure out by myself what am I doing wrong and why 👍🏼

I think the better approach here would be to use mkRenamedOptionModule to rename rome -> biome. You get the alias and people will be prompted to switch.

Implemented this approach. For some reason, the deprecation warning is not appearing when enabling the hook:

rome.enable = true;

There's no need to have both rome and biome in config.hooks.

I can't seem to make it work without having config.hooks entries for both tools. By omitting rome there, the following error appears:

error: The option `hooks.rome.entry' is used but not defined.

From the failing build:

pre-commit-run> - hook id: nixpkgs-fmt
pre-commit-run> - files were modified by this hook

@oxcabe, could you please remove all the code formatting changes? The diff should be readable and contain just the changes you're proposing. Thanks!

What should I do here?

See if you can move that rec around to stop it from reformatting everything. If not, then commit the formatting changes.

Ready!