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

# run()

> **run**(`runId`): `Promise`\<[`HarnessRun`](/docs/agent-sdk/harness-sdk/harness/get#harnessrun) | `undefined`>

Claim and execute an admitted run; host task handlers call this with their persistent run id.

**Parameters**

| Parameter | Type |
| - | - |
| `runId` | `string` |

**Returns**
`Promise`\<[`HarnessRun`](/docs/agent-sdk/harness-sdk/harness/get#harnessrun) | `undefined`>