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

# Output policy

> Control whether intermediate SubAgent narration becomes public.

Output policy changes which model messages Harnest publishes. It does not change prompts or model responses.

| Value      | Behavior                                                        |
| ---------- | --------------------------------------------------------------- |
| `suppress` | Hide provisional SubAgent narration; the default                |
| `include`  | Publish that narration to neutral transports and the playground |

```python theme={null}
from harnest.lifecycle import lifecycle
from harnest.output import OutputPolicy


@lifecycle.output_policy
def output_policy():
    return OutputPolicy(subagent_messages="include")
```

## What remains visible

| Event                           | `suppress` | `include` |
| ------------------------------- | ---------: | --------: |
| Root-agent messages             |        Yes |       Yes |
| Tool calls and results          |        Yes |       Yes |
| Final answer                    |        Yes |       Yes |
| Intermediate SubAgent narration |         No |       Yes |
| Hidden model reasoning          |         No |        No |

<Warning>
  Intermediate narration may be provisional and later revised. Use `include` only when your product deliberately presents progress.
</Warning>

## Scope

| Property      | Rule                                              |
| ------------- | ------------------------------------------------- |
| Factory       | Synchronous and zero-argument                     |
| Allowed       | Zero or one per root agent                        |
| Frameworks    | Managed and advanced roots through neutral routes |
| Native routes | Framework-owned                                   |
| Tests         | Does not change authored fixtures                 |