- 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>
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