Exit Review — Session Learning Classification v3.0

Classify accumulated learnings before session ends.

Classification

Workflow

1. Read accumulated learnings from session buffer
2. For each learning: a. Classify as GREEN/YELLOW/RED b. If GREEN: write to $VAULT_DIR/global/wiki/{category}/ c. If YELLOW: write to $VAULT_DIR/projects/{project}/wiki/ d. If RED: discard with warning
3. Update vault indices

Learning Format

---
type: learning
classification: GREEN
source: session-2026-04-04
confidence: 0.3
sessions_confirmed: 1
category: typescript
---

# Use zod for runtime validation at API boundaries

Runtime validation with zod catches type mismatches that TypeScript alone misses at API boundaries.
Particularly useful for external API responses where the shape is not guaranteed.

## Evidence
- Used successfully in auth endpoint validation
- Caught 3 type mismatches in first session

Trigger

• Automatically triggered by Stop event via session-end-handoff.sh
• Can be invoked manually: /exit-review

Integration

• session-accumulator.sh collects learnings during session
• This skill classifies them at session end
• vault-graduation.sh promotes high-confidence ones to rules at next SessionStart