Slack Thread: Authentication Service Follow-up 17

Date: 2026-01-04 Channel: #release-checkout Service: Authentication Service Incident Reference: INC-2025-107 Jira Reference: ACME-1017 GitHub Reference: GH-1001

Noah Garcia: We are reviewing INC-2025-107 for Authentication Service. The main concern is whether the remediation in ACME-1017 also covers downstream impact to Checkout Service and Billing Service.

Elena Rossi: I checked traces for Authentication Service, Inventory Service, and Notification Service. The correlation IDs line up with the incident timeline, but the highest error rate stays inside Authentication Service.

Sam Rivera: Please make sure GitHub item GH-1001 includes contract tests for API API-AUTHENTICATION-02 and an update to the runbook.

Jordan Kim: Agreed. I will add release readiness notes, dashboard screenshots, and a rollback checkpoint before this goes to canary.

Maya Chen: Decision: keep ACME-1017 open until staging replay passes and the incident review confirms no unsupported customer-impact claims.