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

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

  return chunks;
}
```