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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, 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)