# Time Travel Safety Matrix

**Source:** RFC-008 (Time Travel Invariants)

| Universe Type | Zone | Traversal | Stability | Notes |
|---------------|------|-----------|-----------|-------|
| Green-zone    | Same partition | ❌ Forbidden | Stable | Entropy arrow enforced |
| Green-zone    | Cross partition | ❌ Forbidden | Stable | Partition keys don’t align |
| Red-zone      | Same partition | ✅ Allowed | Unstable | Loops fold, clarity decays |
| Red-zone      | Cross partition | ✅ Conditional | Fragile | Requires resonance overlap |
| Red → Green   | Overlap only | ✅ Temporary | Fragile | Incarnation possible |
| Green → Red   | ❌ Forbidden | N/A | vSouls collapse |