A repository team uses separate agent-assisted stages for triage, implementation, validation, and release review. After a failed release candidate, the team reviews the workflow logs and artifacts to determine where the multi-agent handoff broke. Which option best explains the failure path? Select one answer.

The correct answer is that the implementation changed files outside the triage scope. The triage-summary job identified issuescope=checkout retry timeout, indicating the problem was limited to the checkout retry logic. However, the implementation-session job's output touchedpaths=src/checkout/retry.ts,src/payment/gateway.ts shows that changes were also made to src/payment/gateway.ts. This discrepancy suggests the implementation agent modified a file (src/payment/gateway.ts) that was not part of the initially triaged scope. The validation job then failed specifically on tests/payment/gateway.test.ts, confirming that the unexpected change in the payment gateway code introduced a regression. The other options are incorrect: The release-review agent skipped because the validation job failed, not because workflowdispatch was manual. The condition needs.validation.result == 'success' was false. The validation job did not fail because no artifact was uploaded; it explicitly uploaded validation-report-884192.zip and failed due to a test failure. The triage-summary job concluded with success, meaning it did not fail before implementation started.