01 — Hello World

TL;DR: Confirms the toolchain works. Subclasses WasmBehaviour, logs via Debug.Log, reads Time.time, and serializes one int across deserialize/serialize cycles. Works in any ObjectContext (Avatar / Prop / World).

Scene setup

One GameObject in your content root.
CCKWasmProjectDescriptor on the content root.
HelloWorld script attached to the GameObject (or added to includedScripts on the descriptor).

Code

using UnityEngine;
using WasmScripting;

public partial class HelloWorld : WasmBehaviour
{
    public int logEveryNFrames = 60;

    [WasmSerialized] private int frames;

    void Start()
    {
        Debug.Log("HelloWorld: script started.");
    }

    void Update()
    {
        frames++;
        if (frames % logEveryNFrames == 0)
        {
            Debug.Log($"HelloWorld: frame {frames}, t={Time.time:F2}s");
        }
    }

    void OnDestroy()
    {
        Debug.Log("HelloWorld: script stopped.");
    }
}

Source file: examples/01_HelloWorld.cs.

What to look for

Unity console shows HelloWorld: script started. once the content loads.
A log line every logEveryNFrames (default 60 ≈ once per second at 60 fps).
On instance disposal (teleport away, world unload): HelloWorld: script stopped.

Walkthrough

public int logEveryNFrames = 60; — public field, serialized by default; editable in the Unity inspector.
[WasmSerialized] private int frames; — private field, serialized because of the attribute. Survives across build→runtime. If you reset the VM (content reload) the counter resets too.
Debug.Log — routed via CVR-GameFiles/WasmBinder.LinksManual.UnityEngine/DebugLinksManual.cs to the Unity/CVR console.
Time.time — bound read-only; returns seconds since scene load.

Permission model

Debug.Log and Time.time are (Any, Any, Any) — no context requirements. HelloWorld works in avatars, props, and worlds.

Extensions to try

Change logEveryNFrames in the inspector and confirm rebuild reflects it.
Add void OnEnable() => Debug.Log("Enabled"); and void OnDisable() => Debug.Log("Disabled"); and watch the enable/disable transitions.
Mark logEveryNFrames [NonWasmSerialized] and observe that inspector edits no longer persist through build.

Events — what other Unity events you can add.
Serialization — attribute rules.