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

# OutputNotification

> Diagnostic output the agent writes to a named channel.

```typescript
interface OutputNotification extends Omit<OutputPayload, "level">
```

## Properties

**channel** `string` *required*

Name of the output channel to write to (e.g. `"Devin"`, `"Devin MCP"`).

**level** `string & object | OutputLevel`

**Type:** `string & object | OutputLevel`

**message** `string` *required*

The message to append to the channel.

**method** `"_cognition.ai/output"` *required*

**sessionId** `string` *required*

ACP session ID that owns this output event.


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