# TANRAIL ONE — PHASE 4.8 VERIFICATION GATE
## Security Hardening, Tenant Isolation & Policy Authorization

---

### Verification Summary

- **Phase**: Stage 4.8 — Security Hardening, Tenant Isolation & Policy Authorization
- **Status**: COMPLETE — VERIFIED
- **Date**: 2026-09-04

---

### Verification Metrics

```text
STAGE 4.8 STATUS:
COMPLETE — VERIFIED

TESTS:
234/234 passed

ASSERTIONS:
479

FAILURES:
0

ERRORS:
0

SKIPPED:
0

PINT:
CLEAN

TENANT ISOLATION:
PASS

BUSINESS UNIT ISOLATION:
PASS

POLICY AUTHORIZATION:
PASS

ACCOUNTING REGRESSION:
NONE

GL REGRESSION:
NONE
```

---

### Implemented Artifacts

1. **Policies**:
   - `app/Domains/Core/Policies/InvoicePolicy.php`
   - `app/Domains/Core/Policies/SupplierInvoicePolicy.php`
   - `app/Domains/Core/Policies/CreditNotePolicy.php`
   - `app/Domains/Core/Policies/PaymentAllocationPolicy.php`
2. **Policy Shims**:
   - `app/Policies/InvoicePolicy.php`
   - `app/Policies/SupplierInvoicePolicy.php`
   - `app/Policies/CreditNotePolicy.php`
   - `app/Policies/PaymentAllocationPolicy.php`
3. **Registration**:
   - Registered in `app/Providers/AppServiceProvider.php` via `Gate::policy()`
4. **Automated Security Tests**:
   - `tests/Feature/Core/Phase48CommercialSecurityTest.php`

---

### Next Phase Gate

```text
HARD STOP:
AWAITING HUMAN AUTHORIZATION FOR STAGE 4.9 (ADVERSARIAL SECURITY TESTING & FAILURE INJECTION)
```