[Memory] Create root cause pattern memories from PR #908 retrospective #952
Description
Context
PR #908 retrospective identified 3 root cause patterns that should be documented as memories for future prevention.
Problem Statement
Valuable root cause patterns exist only in retrospective document. Need to extract into searchable memories for cross-session reference.
Proposed Memories
1. Root Cause Pattern: Governance Without Enforcement
File: .serena/memories/root-cause-governance-enforcement.md
Content:
- Pattern ID: RootCause-Process-001
- Category: Fail-Safe Design
- Description: Governance limits exist but not enforced programmatically
- Detection signals
- Prevention skills
- Evidence from PR feat(skill): add reflect skill and auto-learning hook #908
- Related patterns
2. Root Cause Pattern: Late Feedback Loop
File: .serena/memories/root-cause-late-feedback.md
Content:
- Pattern ID: RootCause-Process-002
- Category: Shift-Left Failure
- Description: Issues discovered in CI that should be caught locally
- Detection signals
- Prevention skills
- Evidence from PR feat(skill): add reflect skill and auto-learning hook #908
- Related patterns
3. Root Cause Pattern: Scope Creep via Tool Side Effects
File: .serena/memories/root-cause-scope-creep-tools.md
Content:
- Pattern ID: RootCause-Process-003
- Category: Cross-Cutting Concerns
- Description: Tools with broad scope bundle unrelated changes
- Detection signals
- Prevention skills
- Evidence from PR feat(skill): add reflect skill and auto-learning hook #908
- Related patterns
4. Case Study: PR #908 - 228 Comment Failure
File: .serena/memories/case-study-pr-908.md
Content:
- Summary of failure
- Key metrics (228 comments, 59 commits, 95 files)
- Root causes identified
- Learnings extracted
- Prevention implemented
- Reference to retrospective document
Acceptance Criteria
- All 4 memory files created
- Proper Serena memory format
- Cross-references between patterns
- Links to retrospective, issues, and PRs
- Added to memory-index.md
Effort Estimate
2 hours
Priority
P1 - Important (captures institutional knowledge)
Related Issues
- Issue [P0] Create pre-PR validation script (Validate-PRReadiness.ps1) #934-949 (prevention implementations)
- PR feat(skill): add reflect skill and auto-learning hook #908 (evidence)
References
.agents/retrospective/2026-01-15-pr-908-comprehensive-retrospective.md (lines 997-1127, 1360-1368)