⚠️ report_incomplete: The `vally` eval run crashed before scoring any test cases. The executor failed with `Error: Session was not created with authentication info or custom provider` when attempting to start the `copilot-sdk` session for the `basic-usage` stimulus. This is an authentication/credential failure — the `copilot-sdk` executor needs credentials (e.g., a GitHub Copilot token or custom provider config) that were not present in this environment. No results were produced (`results.jsonl` is empty).