{
  "type": "object",
  "properties": {
    "fp_id": {"type": "string", "pattern": "^[a-z0-9][a-z0-9_]*$"},
    "t2i_prompt": {"type": "string", "minLength": 30},
    "key_elements": {"type": "array", "items": {"type": "string"}}
  },
  "required": ["fp_id", "t2i_prompt", "key_elements"],
  "additionalProperties": false
}