> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-typedoc-upgrade.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# startTurn

> TypeScript SDK reference

> **startTurn**(`opts?`): [`Turn`](../interfaces/turn)

Defined in: [src/genai/api.ts:54](https://github.com/wandb/weave/blob/8c5f077eb11c42b84000726ff20504abc728d3fb/sdks/node/src/genai/api.ts#L54)

Start a new Turn. If a Conversation is active, the turn inherits its
`conversationId`; otherwise the turn has no conversation id.

## Parameters

### opts?

[`TurnInit`](../interfaces/turninit) = `{}`

## Returns

[`Turn`](../interfaces/turn)

## Examples

```ts twoslash theme={null}
// @noErrors
weave.startTurn();
```

```ts twoslash theme={null}
// @noErrors
weave.startTurn({
  agentId: 'research-bot-prod',
  agentName: 'research-bot',
  agentDescription: 'Looks up facts on Wikipedia.',
  agentVersion: '1.4.2',
  model: 'gpt-4o',
  userMessage: 'What is the weather in Tokyo?',
  systemInstructions: ['You are a helpful weather bot.'],
  startTime: new Date('2026-05-29T10:00:00.000Z'),
});
```