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AxErrorCategory

type AxErrorCategory = 
  | "validation_error"
  | "assertion_error"
  | "timeout_error"
  | "abort_error"
  | "network_error"
  | "auth_error"
  | "rate_limit_error"
  | "function_error"
  | "parsing_error"
  | "unknown_error";

Defined in: https://github.com/ax-llm/ax/blob/9a5a7060a48f9eef46efc680b0cdf6b42bff5df2/src/ax/dsp/metrics.ts#L34