SOP-008: Post-Incident & Regression Loop

Version: 1.0 · Owner: SRE + Developer · Gate: G5

Purpose & scope

Close the quality feedback loop: postmortem, mandatory regression artifacts, and updates to spec/ADR when needed.

Roles

Role	RACI
SRE	A — postmortem process
DEV	R — regression test PR
ARCH	C — ADR updates
PO	C — spec amendments

Prerequisites

• Sev-1 or Sev-2 incident resolved (SOP-007)
• Incident ticket with timeline

Procedure

1. Schedule blamesless postmortem — Within 48h for Sev-1; 5 business days for Sev-2.
2. AI draft postmortem — From ticket + logs + deploy history; human edits all sections.
3. Identify gaps — Classify: test gap, spec gap, ADR gap, monitoring gap, process gap.
4. Create action items — Each with owner and due date in ticket.

Mandatory artifacts (by gap type)

Gap	Required action	Due
Test gap	Regression test PR merged	48h (Sev-1), 5 days (Sev-2)
Monitoring gap	New alert or baseline update	5 days
Spec gap	SOP-003 amendment PR	5 days
ADR gap	SOP-002 new/supersede ADR	10 days
Process gap	SOP update PR	10 days

5. Regression test — AI drafts from incident; DEV reviews; must fail on reproduced condition pre-fix.
6. Publish postmortem — Internal wiki + link from Backstage service page.
7. Verify closure — SRE confirms all action items done before incident closed.

Definition of Done

• [ ] Postmortem published
• [ ] Regression test merged (Sev-1/2)
• [ ] Monitoring/spec/ADR actions tracked to completion
• [ ] Incident ticket closed

Related SOPs

• SOP-007 · SOP-002 · SOP-003