# Basic Due Diligence

Clone this HF repository and inspect:

1. `README.md`
2. `final_proof/FINAL_PROOF_README.md`
3. `final_proof/NO_COST_CONFIDENCE_README.md`
4. `final_proof/A_GRADE_PROMOTION_README.md`

Then clone the upstream AWS source next to `modern_code`:

```powershell
git clone https://github.com/aws-samples/aws-mainframe-modernization-carddemo.git source
git -C source checkout 59cc6c2fd7ebd7ef7925cad552a01a4b8b6e4d5e
```

From `modern_code`, run:

```powershell
python -m unittest discover -s tests
python tools\replay_static_oracles.py --source-root ..\source --out-dir .\reports --source-head 59cc6c2fd7ebd7ef7925cad552a01a4b8b6e4d5e
python tools\build_no_cost_confidence.py --source-root ..\source --out-dir .\final_proof
python tools\evaluate_a_grade_promotion.py --source-root ..\source --out-dir .\final_proof
```

Expected high-level result:

- tests pass,
- static replay returns `"passed": true`,
- no-cost confidence returns `"reviewer_posture": "strong_pre_runtime_confidence"`,
- A-grade gate returns `"promotable_to_A": false`.

That last result is intentional: `cjc0013/aws-carddemo-no-cost-modernization-proof` does not claim live COBOL/CICS runtime parity.