呼び出し元を構築する

const capabilities = await client.getAdcpCapabilities();
// → { supported_protocols: [...], adcp_versions: [...], features: {...} }

const products = await client.getProducts({
  brief: 'Video campaign for pet owners, 18–34, US, $50K monthly',
});

const buy = await client.createMediaBuy({
  idempotency_key: crypto.randomUUID(),
  account: { brand: { domain: 'acme.com' }, operator: 'sales.example' },
  packages: [/* … */],
});

const response = await client.createMediaBuy({/* … */});

if ('errors' in response) {
  // Error: don't retry without fixing — read response.adcp_error.issues[]
  // for correctable failures (validation, oneOf, etc.)
} else if (response.status === 'submitted') {
  // Async: the work is queued, NOT done. The completion payload arrives
  // later — either via webhook (preferred) or by polling the AdCP task.
} else {
  // Sync success: response carries the completion payload directly.
  // (e.g., response.media_buy_id, response.packages)
}

const { code, recovery, issues } = response.adcp_error;

switch (recovery) {
  case 'correctable':
    // Buyer-side fix. Patch the JSON pointers from issues[], resend with
    // the SAME idempotency_key (fresh key = new operation).
    break;
  case 'transient':
    // Retry with the SAME idempotency_key. Same key on retry replays the
    // cached response if the work landed.
    break;
  case 'terminal':
    // Human action required. Don't retry.
    break;
}

const delivery = await client.getMediaBuyDelivery({
  media_buy_ids: ['mb_123', 'mb_456'],
  window: { start: '2026-05-01T00:00:00Z', end: '2026-05-02T00:00:00Z' },
});