Your critical emails still deliver when providers fail.

// Agent sends invoice — durable operation with guarantee
const op = await truncus.operations.create({
  type: 'email.send',
  delivery_guarantee: 'exactly_once',
  params: {
    from: 'billing@yourapp.com',
    to: customer.email,
    subject: `Invoice #${invoice.id}`,
    html: renderInvoice(invoice),
  },
});

const result = await truncus.operations.get(op.operation_id);
// { status: "completed", provider: "ses", delivered_at: "..." }

// Agent handles bounce gracefully
const email = await truncus.emails.get(messageId);

if (email.intelligence.failure_category === 'permanent') {
  // "The recipient email does not exist."
  await removeFromList(email.to);
} else if (email.intelligence.is_retryable) {
  // Already handled — Truncus retried across providers
}

// Agent validates before risking domain reputation
const check = await truncus.emails.validate({
  from: 'agent@yourapp.com',
  to: prospect.email,
  subject: 'Partnership opportunity',
});

if (check.recommendation === 'do_not_send') {
  // Skip — high bounce risk
  console.log(`Skipping: ${check.checks.spam_risk}`);
} else {
  await truncus.emails.sendSync({ ... });
}