It worked, so I wrapped it in a skill that does it end-to-end. Tested on popular repo and it all worked, see the demo in GitHub repo.
You can just run /jevify in your repo. It marks which ones could move to Jev, and converts to use Jev (TypeSafe, OpenRouter, or Vercel).
The scan works without a Jev key if you just want to see what it finds.
Not affiliated with TypeSafe. Would love to hear how it goes!
Give it a try! Github: https://github.com/Kevin-Zhouu/jevify/