Under the concurrent 10-repo fleet fan-out, individual gh calls intermittently hit transient GitHub API errors (observed: HTTP 401 and HTTP 500 on workflow dispatch), failing the run on a different repo each time. Add a gh() wrapper sourced via BASH_ENV that retries only transient HTTP 401/403/429/5xx (and secondary-rate-limit markers) with bounded backoff, and passes every other result through unchanged. It returns immediately on exit 0, so a gh call that succeeds and reports a logical failure conclusion (what the negative probes assert) is never retried; real 404/422 errors propagate. Five attempts, fails closed. actionlint clean; masking-safety proven by bash unit tests (logical failures and 404/422 pass through, only transient HTTP errors retry).