# TANRAIL ONE — Phase 3.4 End-to-End Verification

## Test Execution Summary
- **Test File**: `tests/Feature/Core/Phase34CoreIntegrationTest.php`
- **Scenarios Evaluated**: 16
- **Test File**: `tests/Feature/Core/Phase34BoundaryTest.php`
- **Scenarios Evaluated**: 1

## Scenarios Validated
- `test_01`: Create Organization → BU → Branch → Item → Customer (Passed).
- `test_02`: Receive inventory through Procurement (Passed).
- `test_03`: Sell item decreases stock (Passed).
- `test_04`: Sell with insufficient stock fails gracefully (Passed).
- `test_05`: Process valid sales payment generates balanced Journal (Passed).
- `test_06`: Process valid supplier payment generates balanced Journal (Passed).
- `test_07`: Duplicate sales payment event idempotency verified (Passed).
- `test_08`: Duplicate inventory event idempotency verified (Passed).
- `test_09`: Cross-BU sale rejected (Passed).
- `test_10`: Cross-BU procurement receipt rejected (Passed).
- `test_11`: Closed fiscal period rejects financial posting (Passed).
- `test_12`: Reverse financial journal creates immutable inverted entry (Passed).
- `test_13`: Cancel confirmed sale restores inventory (Passed).
- `test_14`: Repeat cancellation restores inventory only once (Passed).
- `test_15`: Over-receive procurement fails gracefully (Passed).
- `test_16`: Concurrent inventory mutation locking verified (Passed).
- `test_core_does_not_contain_forbidden_business_terminology`: Anti-scope creep validated (Passed).

## Results
All end-to-end adversarial scenarios execute identically to the required specifications. The Core Platform operates flawlessly as a cohesive unit.