Slack Thread: Authentication Service Follow-up 29

Date: 2026-05-16 Channel: #team-service-review Service: Authentication Service Incident Reference: INC-2026-109 Jira Reference: ACME-1009 GitHub Reference: GH-1013

Devon Patel: We are reviewing INC-2026-109 for Authentication Service. The main concern is whether the remediation in ACME-1009 also covers downstream impact to Checkout Service and Billing Service.

Priya Shah: 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.

Noah Garcia: Please make sure GitHub item GH-1013 includes contract tests for API API-AUTHENTICATION-02 and an update to the runbook.

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

Sam Rivera: Decision: keep ACME-1009 open until staging replay passes and the incident review confirms no unsupported customer-impact claims.