Remote function query does not update when using schema transforms

[machadinhos]

Describe the bug

Hi!

I started experiencing some issues of queries not updating when I call .updates() on them and after a lot of testing I found the cause.
If you use a schema that transforms the input (like valibot's v.transform()) sveltekit fails to update the query, I assume because the backend sends to the frontend the transformed input and the frontend tries to find the query instance that has that input but it can't cause it was transformed.

If you remove the v.transform it works as it should.

I'm not sure if this a known issue, couldn't find anything about this.

Let me know if you want a reproduction repo.

Thank you!

Reproduction

Here is a quick example (you need to install valibot npm i -D valibot):

// the remote functions
import { command, query, requested } from "$app/server";
import * as v from "valibot";

let myList: number[] = [];

export const addToMyList = command(async () => {
  myList.push(0);
  await requested(getMyList, 1).refreshAll();
});

export const getMyList = query(
  v.pipe(
    v.number(),
    v.transform((n) => String(n)),
  ),
  (n) => {
    return myList;
  },
);

The client code:

<script lang="ts">
  import { addToMyList, getMyList } from "$lib/test.remote";
</script>

<button onclick={async () => await addToMyList().updates(getMyList(1))}>Add</button>

<p>{(await getMyList(1)).join(", ")}</p>

Has you can see, 1 is passed both to the await getMyList(1) and to the updates(getMyList(1)) but it doesn't get refreshed when you click "Add".

Logs

System Info

System:
    OS: Windows 11 10.0.26100
    CPU: (28) x64 13th Gen Intel(R) Core(TM) i7-13850HX
    Memory: 12.89 GB / 31.55 GB
  Binaries:
    Node: 25.9.0 - C:\Users\z0057a7a\AppData\Local\pnpm\node.EXE
    npm: 11.12.1 - C:\Users\z0057a7a\AppData\Local\pnpm\npm.CMD
    pnpm: 10.33.0 - C:\Users\z0057a7a\AppData\Local\pnpm\pnpm.CMD
    bun: 1.3.11 - C:\Users\z0057a7a\scoop\shims\bun.EXE
  Browsers:
    Edge: Chromium (145.0.3800.65)
  npmPackages:
    @sveltejs/adapter-node: ^5.5.4 => 5.5.4
    @sveltejs/kit: ^2.57.0 => 2.57.1
    @sveltejs/vite-plugin-svelte: ^7.0.0 => 7.0.0
    svelte: ^5.55.2 => 5.55.2
    vite: ^8.0.7 => 8.0.8

Severity

serious, but I can work around it

Additional Information

No response