/** A deep copy no plugin can change. Plugins read data through it, never the host's own objects. */
export function cloneAndFreeze<T>(value: T): T {
  if (Array.isArray(value)) {
    return Object.freeze(value.map((entry) => cloneAndFreeze(entry))) as T;
  }
  if (value !== null && typeof value === "object") {
    return Object.freeze(
      Object.fromEntries(Object.entries(value).map(([key, entry]) => [key, cloneAndFreeze(entry)])),
    ) as T;
  }
  return value;
}