---

name: "Post-Mortem Facilitation Skill" description: "Learn from failures without blame. Improve systems, not shame people." applyTo: "/incident,/postmortem,/retro,/failure,**/outage"

Post-Mortem Facilitation Skill

Learn from failures without blame. Improve systems, not shame people.

Core Principle

Every incident is a gift—an opportunity to make the system stronger. Blame prevents learning.

The Blameless Philosophy

Blame Culture	Learning Culture
"Who messed up?"	"How did the system allow this?"
"They should have known"	"Why wasn't it obvious?"
"Follow the process!"	"Is the process followable?"
"Don't let it happen again"	"How do we prevent this class of problem?"

Key insight: People did what made sense to them at the time, with the information they had.

Post-Mortem Template

1. Summary (2-3 sentences)

What happened, when, impact.

2. Timeline

Time (UTC)	Event	Actor/System
14:00	Deployment started	CI/CD
14:05	Error rate increased	Monitoring
14:07	On-call paged	PagerDuty
...	...	...

3. Impact

• Duration: How long?
• Users affected: How many?
• Revenue impact: If applicable
• Data loss: Any?
• Reputation: Customer communications?

4. Root Cause(s)

Not "human error"—go deeper:

• Why was the error possible?
• What safeguards didn't catch it?
• What systemic conditions contributed?

5. What Went Well

• Detection time
• Response coordination
• Communication
• Recovery speed

6. What Could Be Improved

• Missing alerts
• Documentation gaps
• Process friction
• Tool limitations

7. Action Items

Action	Owner	Due Date	Priority
Add validation	@alice	2026-02-15	P1
Improve runbook	@bob	2026-02-10	P2
...	...	...	...

Rule: Every action item has an owner and date. No orphan items.

Facilitation Guide

Before the Meeting

1. Gather timeline from logs, chat, alerts
2. Identify all participants (responders, stakeholders)
3. Set expectation: learning, not blame
4. Share draft timeline for review

During the Meeting

Opening (5 min)

"We're here to understand what happened and improve. This is blameless—we assume everyone acted reasonably with the info they had. Focus on systems and processes, not individuals."

Timeline Walk-through (20 min)

• Go chronologically
• Ask: "What did you know at this point?"
• Ask: "What options did you see?"
• Fill in gaps in understanding

Root Cause Discussion (15 min)

• Use 5 Whys technique
• Look for systemic issues
• Avoid stopping at "human error"

Action Items (15 min)

• Prioritize by impact and effort
• Assign owners IN the meeting
• Set realistic due dates
• Limit to 3-5 meaningful items (not 20 small ones)

Closing (5 min)

"Thank you for the candid discussion. We'll share the write-up for review. Any final thoughts?"

After the Meeting

1. Write up within 24 hours
2. Circulate for factual corrections
3. Publish to team/org
4. Track action items to completion
5. Review effectiveness in 30 days

Anti-Patterns to Avoid

Anti-Pattern	Why It's Harmful
Naming individuals in root cause	Creates fear, hides future problems
"They should have..."	Hindsight bias, doesn't fix systems
No action items	Wasted learning opportunity
Too many action items	Nothing gets done
Action items without owners	Nothing gets done
Never following up	Actions drift, cynicism grows
Only for big incidents	Small incidents have big lessons

Questions That Unlock Learning

• "What information would have helped at that moment?"
• "What made sense to do at the time?"
• "Where did our mental model differ from reality?"
• "What surprised you?"
• "What was harder than expected?"
• "If this happens again, what would we do differently?"
• "What's the smallest change that would have prevented this?"

Severity Classification

Severity	Criteria	Post-Mortem Required?
SEV1	Customer-facing outage > 30min	Yes, within 48 hours
SEV2	Degraded service, workaround exists	Yes, within 1 week
SEV3	Internal impact, no customer effect	Recommended
SEV4	Near-miss, caught before impact	Optional but valuable

Connecting to Prevention

Post-mortems feed into:

• Runbooks: Better playbooks for next time
• Monitoring: New alerts for early detection
• Testing: New test cases for CI/CD
• Architecture: Design changes to prevent recurrence
• Training: Skills gaps identified

The Phoenix Post-Mortem

A personal example from Alex's own evolution...

What we learned from the Phoenix incident:

• Two sources of truth caused confusion
• Testing in production (Master Alex) was risky
• Kill switches need multiple layers
• Document decisions as you make them

These lessons became: ADR-006, RISKS.md, the 5-layer protection system.

Every failure makes the architecture stronger.

Synapses

See synapses.json for connections.