import Retell from 'retell-sdk';

const client = new Retell({
  apiKey: process.env['RETELL_API_KEY'], // This is the default and can be omitted
});

const response = await client.playground.completion('agent_id', {
  messages: [{ content: 'hi how are you doing?', role: 'agent' }],
});

console.log(response.current_node_id);

{
  "messages": [
    {
      "message_id": "Jabr9TXYYJHfvl6Syypi88rdAHYHmcq6",
      "role": "agent",
      "content": "hi how are you doing?",
      "created_timestamp": 1703302428855
    }
  ],
  "current_state": "<string>",
  "current_node_id": "<string>",
  "dynamic_variables": {},
  "call_ended": true,
  "knowledge_base_retrieved_contents": [
    "<string>"
  ]
}