The filter condition `if types is None or item.type not in types:` will skip ALL items when `types=None`, which inverts the typical filter semantics where `None` means "capture everything". Currently, calling `capture_items()` without arguments returns an empty list because every item is skipped. The correct logic should be `if types is not None and item.type not in types:` to only skip items when a filter is specified and the item doesn't match.