RetryPolicy

How a node is run again after its own failure, inside the run.

A node that throws, or returns NodeResult.Fail, is run again against the same committed snapshot while its error passes retryOn and attempts remain. By default only a recoverable error is retried (LLMError.isRecoverable). A cancellation, a result the kernel rejects (an undeclared write, an invalid route) and a suspension are never retried.

The wait after the n-th failed attempt is initialBackoff * backoffFactor^(n-1), at most maxBackoff. It is an interruptible wait: cancelling the run, or its deadline expiring, ends the retries. The attempts belong to one run: recover runs a failed task again with its full policy.

Every value is validated on the way in: apply and the with* setters throw IllegalArgumentException; RetryPolicy.of returns a ValidationError for untrusted input.