Slack Thread: Authentication Service Follow-up 20

Date: 2026-02-06 Channel: #eng-incident Service: Authentication Service Incident Reference: INC-2026-110 Jira Reference: ACME-1020 GitHub Reference: GH-1004

Jordan Kim: We are reviewing INC-2026-110 for Authentication Service. The main concern is whether the remediation in ACME-1020 also covers downstream impact to Checkout Service and Billing Service.

Maya Chen: 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.

Devon Patel: Please make sure GitHub item GH-1004 includes contract tests for API API-AUTHENTICATION-01 and an update to the runbook.

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

Noah Garcia: Decision: keep ACME-1020 open until staging replay passes and the incident review confirms no unsupported customer-impact claims.