class ModelError(Exception): pass class ModelProviderError(ModelError): """Exception raised when a model provider returns an error.""" def __init__( self, message: str, status_code: int = 502, model: str | None = None, ): super().__init__(message) self.message = message self.status_code = status_code self.model = model class ModelRateLimitError(ModelProviderError): """Exception raised when a model provider returns a rate limit error.""" def __init__( self, message: str, status_code: int = 429, model: str | None = None, ): super().__init__(message, status_code, model)