DUE_DILIGENCE.md

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:

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

From modern_code, run:

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.