> Historical note from the supplied ZIP. Current findings: `142-REQUIREMENT-AUDIT.md` and `CONSOLIDATED-VERIFICATION.md`.

# Coupon module development update
- Admin create/list/enable/disable coupons: `/admin/coupons`.
- Optional coupon code on COD checkout.
- Coupon row lock, validation, discount calculation and usage increment are inside the existing order transaction.
- New migration adds subtotal, discount, coupon_id and coupon_code to orders.
- Tests: pure PHP coupon math; PHP lint and ZIP CRC. **No MySQL or browser integration tests executed.**
- The ZIP is a CI4 application overlay, not a complete framework package. Payment/courier integrations remain unverified.