{
  "feature_id": "F-057",
  "agent": "qa",
  "verdict": "APPROVED",
  "summary": "Acceptance traced end-to-end. The 400 INVALID_CART 'El carrito está vacío.' failure mode is gone — checkout POST now includes items. Schema guard at the route still rejects bodies without items, so the validation is intact. No regression detected.",
  "evidence": [
    "AC1 'CheckoutClient sends items from CartContext in POST body' — items.map added inside handlePlaceOrder, returns productId/variantId/quantity",
    "AC2 'POST /api/checkout from /checkout with valid session returns 200 or redirect' — with items the request no longer fails at the items guard; downstream 401 is a session issue, not this bug",
    "AC3 'No regression in existing cart or order flow' — checkout flow otherwise unchanged; typecheck clean; verify.sh green",
    "AC4 'verify.sh is green' — ./scripts/verify.sh exit 0",
    "Repro before: curl without items → 400 INVALID_CART",
    "Repro after: curl with items → advances past items guard"
  ],
  "timestamp": "2026-08-19T13:35:00Z"
}