{
  "approach": "Ensure that when initializing a Union trait through inheritance, we properly handle the case where inner_traits contains functions or other non-default-value items before attempting to compute the default value. We need to filter out any non-TraitType items from inner_traits during default value computation while preserving the correct behavior for concrete Union classes.",
  "files_to_edit": [
    "traits/trait_types.py"
  ],
  "finish_reason": "stop",
  "hypothesis": "The problem occurs when inheriting a Union subclass and setting a literal value; the derived class's Union gets improperly initialized because its _get_default_value method returns a function bound to the base class rather than performing proper trait initialization.",
  "retries": {},
  "usage": {
    "completion": 137,
    "prompt": 7407,
    "reasoning": 0
  }
}