Bug: The reachability check used 'ssh ... grep ... || echo unreachable',
which conflated grep's 'no matches found' (exit 1) with SSH failure.
This caused clean hosts to be reported as unreachable.
Fix: Add scripts/hermes-reachability-check.sh with the pattern:
out=$(ssh -o BatchMode=yes root@HOST "grep ... 2>/dev/null; true")
if [ $? -ne 0 ]; then verdict="unreachable"
elif [ -n "$out" ]; then verdict="violation: $out"
else verdict="compliant"
fi
This correctly distinguishes:
- SSH failure (connection/auth/route) -> unreachable
- SSH success + grep found matches -> violation
- SSH success + grep found nothing -> compliant
Evidence: 3 of 4 hosts (Tanko, Mumuni, Koonimo) were reported as
'unreachable' when they were actually compliant. Only Koby (.129)
has a real finding (plaintext key in state snapshot).
Used by: hermes-key-enforcement, hermes-config-template,
hermes-agent-baseline contracts.