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My only doubt is if the previous files should still be left in Vite 5 to avoid the breaking change and give more time to others to update.

In the camelCase files we could re-export all from the kebab-case files to preserving compat, though I've not tested if extending types still work this way. It should be rather easy to update though, but would be tough for frameworks who want to support both Vite 4 and 5.

Hard to see how this affects downstream though since ecosystem-ci has a lot of existing reds, but I was thinking if it impacts a lot, we can then do the re-export compat for now.

Maybe good to wait to merge this one until ecosystem-ci can give a better picture of how much needs to be updated. It is in the team board as downstream blocker, so we can discuss it there too.

/ecosystem-ci run

📝 Ran ecosystem CI: Open

Looks like this affects vitest and previewjs 😢 There's part of me that really wants TS to fix it instead

Closed in favour of #14615