What
When a request to the API fails, Claude Code labels the error by its HTTP status, adding _no_retry when the server's x-should-retry header says not to retry. When a certain internal check returns a value, the label is now plain http_${status} even if x-should-retry is false. A new helper matches status 503 (service unavailable) with x-should-retry set to "false".
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The finding does not say what the internal check tests or where the new 503 helper is used.