Calling a command inside an effect causes an infinite loop

Describe the bug

The following triggers an infinite loop where pending_count is constantly updated.

<script>
  import { mark_seen } from '$lib/foo.remote.ts';

  const { params } = $props();

  $effect(() => {
    $inspect.trace('mark');
    mark_seen(params.id);
  });
</script>

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-piu37bpc?file=src%2Froutes%2F%2Bpage.svelte

Logs

$state pending_count 1
$state pending_count 2
$state pending_count 3
... etc

Severity

serious, but I can work around it

Start with the reproduced case in src/routes/+page.svelte from the linked StackBlitz project and inspect the $effect call to mark_seen(params.id). Run the reproduction and compare its behavior with the pending_count logs. Done means the command no longer causes the effect to loop and pending_count stops increasing continuously.