si_get_offering

si_get_offering → ホストが商品を提示 → ユーザーが同意 → offering_token を付与して si_initiate_session

si_initiate_session → ブランドが最初の応答で商品を提示 → 会話を継続

{
  "offering_id": "nike-summer-sale"
}

{
  "available": true,
  "offering_token": "offering_abc123xyz",
  "ttl_seconds": 3600,
  "checked_at": "2025-01-19T10:00:00Z",
  "offering": {
    "offering_id": "nike-summer-sale",
    "title": "Nike Summer Sale",
    "summary": "Up to 50% off summer collection",
    "price_hint": "from $89",
    "expires_at": "2025-08-31T23:59:59Z"
  }
}

{
  "offering_id": "nike-summer-sale",
  "context": "mens size 14 running shoes near Cincinnati",
  "include_products": true,
  "product_limit": 3
}

{
  "available": true,
  "offering_token": "offering_abc123xyz",
  "ttl_seconds": 3600,
  "checked_at": "2025-01-19T10:00:00Z",
  "offering": {
    "offering_id": "nike-summer-sale",
    "title": "Nike Summer Sale",
    "summary": "Up to 50% off summer collection",
    "price_hint": "from $89"
  },
  "matching_products": [
    {
      "product_id": "nike-pegasus-41",
      "name": "Nike Pegasus 41",
      "price": "$89",
      "original_price": "$130",
      "image_url": "https://cdn.nike.com/pegasus-41.jpg",
      "availability_summary": "Size 14 in stock"
    },
    {
      "product_id": "nike-air-max-90",
      "name": "Nike Air Max 90",
      "price": "$129",
      "image_url": "https://cdn.nike.com/air-max-90.jpg",
      "availability_summary": "Size 14 in stock"
    }
  ],
  "total_matching": 12
}

{
  "available": false,
  "checked_at": "2025-01-19T10:00:00Z",
  "unavailable_reason": "expired",
  "alternative_offering_ids": [
    "nike-fall-collection",
    "nike-clearance"
  ]
}

Host: "Nike has 3 running shoes in size 14: Pegasus 41 ($89), Air Max 90 ($129), Vomero 18 ($139)"
User: "Tell me more about the second one"
Host → si_initiate_session: { context: "User wants more info about the second shoe" }
Brand Agent: ??? (Which shoes were shown? In what order?)

Host → si_initiate_session: {
  context: "User wants more info about the second shoe",
  offering_token: "offering_abc123xyz"
}
Brand Agent: (Looks up token → sees Pegasus, Air Max, Vomero were shown in that order)
Brand Agent: "The Air Max 90 is a classic! It's part of our summer sale..."

// When returning si_get_offering response
const token = generateToken();
await store.save(token, {
  offering_id: request.offering_id,
  context: request.context,
  products_shown: matchingProducts,  // In exact order returned
  product_ids: matchingProducts.map(p => p.product_id),
  queried_at: new Date().toISOString(),
  ttl: 3600
});

return {
  available: true,
  offering_token: token,
  matching_products: matchingProducts,
  // ...
};

// Retrieve the pre-session context
const preContext = await store.get(request.offering_token);
if (preContext) {
  // Now you know exactly what was shown
  // "the second one" = preContext.products_shown[1]
}

{
  "context": "User wants running shoes, mens size 14",
  "offering_id": "nike-summer-sale",
  "offering_token": "offering_abc123xyz",
  "identity": {
    "consent_granted": true,
    "user": { ... }
  }
}