```ts
export function chunk<T>(items: readonly T[], size: number): T[][] {
  if (size <= 0) {
    throw new Error("Size must be a positive integer");
  }

  const chunked: T[][] = [];

  for (let i = 0; i < items.length; i += size) {
    chunked.push(items.slice(i, i + Math.min(size, items.length - i)));
  }

  return chunked;
}
```