Returns the first step of a run with a non-empty error or a Retry rewrite: { StepName, Agent, Message }, or null when every step succeeded without retry/error.
Retry
{ StepName, Agent, Message }
null
Optional
Returns the first step of a run with a non-empty error or a
Retryrewrite:{ StepName, Agent, Message }, ornullwhen every step succeeded without retry/error.