Adding vitest creates dozens of errors (with repro)

[205g0]

Describe the bug

Adding vitest to a project creates dozens of error like following:

[2] /home/projects/sveltejs-kit-template-default-tmdb5e/.svelte-kit/generated/root.svelte:51:5
[2] Error: Variable 'title' implicitly has an 'any' type. (js)
[2]             {#if navigated}
[2]                     {title}
[2]             {/if}

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-tmdb5e?file=svelte.config.js

Wait a bit until the server has started and you should see 21 errors.

Now, change in package.json this line:

		"dev": "concurrently 'vite dev' 'npm run test'  'npm run check:watch'",

to:

		"dev": "concurrently 'vite dev'  'npm run check:watch'",

and remove .svelte-kit and rerun the server with:

rm .svelte-kit/ -rf && npm run dev

and all errors vanish.

I uses the exact setup as in the create SvelteKit demo project.

Logs

To keep this post short, please check repro.

System Info

Check  repro.

Severity

blocking all usage of SvelteKit

Additional Information

No response

[dummdidumm]

I suspect this has something to do with svelte-check going into "check all Svelte files in the project and ignore tsconfig/jsconfig"-mode for some reason.

[205g0]

Is it this line?

  watch(`${workspaceUri.fsPath}/**/*.{svelte,d.ts,ts,js,jsx,tsx,mjs,cjs,mts,cts}`, {

If yes, would including !(test) and !(spec) in the glob pattern work? And setting up an own pararallel tsc type checking process for the vitest files?