Root cause: credentials.json had flat-format test data from old code,
incompatible with current W3C VerifiableCredential struct. Parse error
was hidden by error sanitization.
Fix: cleared old test data. VC flow now works bidirectionally:
- .198: 3/3 issue + 3/3 verify
- .228: issue + verify work (rate-limited during repeated testing)
- Both nodes: list-credentials returns correct counts
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>