> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wandb.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# startSubagent

> TypeScript SDK reference

# startSubagent

▸ **startSubagent**(`opts`): [`SubAgent`](../classes/subagent)

Start a SubAgent span. Same parent-resolution rules as `startTool`.

#### Parameters

| Name   | Type                                         |
| :----- | :------------------------------------------- |
| `opts` | [`SubAgentInit`](../interfaces/subagentinit) |

#### Returns

[`SubAgent`](../classes/subagent)

#### Defined in

[genai/api.ts:66](https://github.com/wandb/weave/blob/6538626556c93d6f31ae725fdefe4e6b8b71bc2c/sdks/node/src/genai/api.ts#L66)

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