Two-Panel (index-based, no marks)

1) Setup

This is arbitrary text. Replace me.

2) Core Function

Notes that correspond to the second code block.

3) Event Wiring

Anything you want to say about the third code block.

// demo.config.js
export const config = {
  appName: "TwoPanel NoMarks",
  version: "0.1.0"
};

// math.js
export const sum = (...xs) => xs.reduce((a, x) => a + Number(x||0), 0);
export const clamp = (x, lo, hi) => Math.max(lo, Math.min(hi, x));

// wire.js
const btn = document.getElementById("demo-btn");
const out = document.getElementById("demo-out");
btn?.addEventListener("click", () => out.textContent = "clicked!");