Custom

const result = await step.custom(
  'fetch-user-data',
  async () => {
    const response = await fetch('https://api.example.com/users/123');
    const userData = await response.json();

    return {
      name: userData.name,
      email: userData.email,
      preferences: userData.preferences,
    };
  },
  {
    outputSchema: {
      type: 'object',
      properties: {
        name: { type: 'string' },
        email: { type: 'string' },
        preferences: { type: 'object' },
      },
      required: ['name', 'email'],
    },
  }
);

// Use the result in a subsequent step
await step.email('welcome-email', async () => {
  return {
    subject: `Welcome ${result.name}!`,
    body: `We'll send updates to ${result.email}`,
  };
});