# TANRAIL ONE — PHASE 4.9 VERIFICATION GATE
## Stage Verification & Formal Scope Audit

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### 1. Gate Audit Summary

| Metric | Target | Verified Live Result | Status |
|---|---|---|---|
| Automated Tests | 247 | **247 Passed** | **PASS** |
| Total Assertions | 498 | **498 Assertions** | **PASS** |
| Test Failures | 0 | **0 Failures** | **PASS** |
| Test Errors | 0 | **0 Errors** | **PASS** |
| Skipped Tests | 0 | **0 Skipped** | **PASS** |
| Code Style (Pint) | Clean | **100% Clean (`{"tool":"pint","result":"passed"}`)** | **PASS** |
| Production Code Modificaton | 0 Files | **0 Files Modified** | **PASS** |
| Schema Changes | 0 Migrations | **0 Migrations Added** | **PASS** |
| GL Balancing | 100% Balanced | **100% Balanced (`sum(DR) == sum(CR)`)** | **PASS** |

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### 2. Stage 4.9 Completion Checklist

- [x] Baseline verified before starting (234 tests, 479 assertions).
- [x] Security test suite created: `tests/Feature/Core/Phase49AdversarialSecurityTest.php`.
- [x] Attack Group A (Cross-Tenant & Cross-BU Isolation) tested & verified.
- [x] Attack Group B (Over-Allocation & Financial State Machine Boundaries) tested & verified.
- [x] Attack Group C (Closed Fiscal Period & GL Failure Injection) tested & verified.
- [x] Attack Group D (Double-Event Delivery & Idempotency) tested & verified.
- [x] Attack Group E (Zero Tax & 4-Decimal Precision Edge Cases) tested & verified.
- [x] 100% test pass rate achieved across full test suite (247 / 247 tests passing).
- [x] Code formatted with Laravel Pint (`vendor/bin/pint --format agent`).
- [x] `docs/phase-4.9-implementation-report.md` generated.
- [x] `docs/phase-4.9-verification-gate.md` generated.
- [x] `docs/CHANGELOG.md` updated.

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### 3. Verification Sign-Off & Stage 4.10 Hard Stop

Stage 4.9 (Adversarial Security Testing & Failure Injection) is **COMPLETE AND FULLY VERIFIED**.

> [!IMPORTANT]
> **HARD STOP**: Do NOT proceed to Stage 4.10 or Phase 5 until explicit human authorization is granted.