- Add explicit set -eo pipefail so npm test:coverage exit code propagates through the pipe (not just tee's always-0 exit) - Scope log file to github.run_id to prevent stale-log false positives on retried steps sharing the same runner /tmp - Tighten grep pattern to \[birpc\] rpc is closed to avoid matching unrelated log lines that happen to contain "rpc is closed" Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>