Expected:
With "@sveltejs/kit": "2.12.1", the service-worker/index.ts file compiled and generated in .svelte-kit/output/client/service-worker.mjs (see "Initial commit")
Issue:
With "@sveltejs/kit": "2.12.2", and later versions doesn't compile the service-worker/index.ts file and it's missing from the app dir (see "Issue" commit message)