llm.NewRetrying wraps a Provider and retries ErrRateLimited, ErrTimeout
and 5xx ErrProvider at most twice. A rate limit waits RetryAfter, capped
at 20 s; other retries use jittered exponential backoff. ErrAuth, 4xx and
other errors are never retried, and no retry is made whose wait would not
end before the caller's context deadline. Generate gets a 60 s per-attempt
timeout when Request.Timeout is 0.
Maestro task: 1a882923-fdb4-4576-ab82-9529e9974b26
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dev_agentandClaude Opus 5.5
cbf24e63e1