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

# Null Emergency Stop • AI Agent SDK

> NullEmergencyStop: Default no-op brake: never engaged, no persistence.

# NullEmergencyStop

> Defined in the [**protocols**](../modules/protocols) module.

<Badge color="blue">AI Agent</Badge>

Default no-op brake: never engaged, no persistence.

Selected by `backend: "off"` (the default) so a gateway with no brake
configured behaves exactly as before — `is_engaged()` is always
`False` and `engage`/`disengage` are inert.

## Methods

<CardGroup cols={2}>
  <Card title="is_engaged()" icon="function" href="../functions/NullEmergencyStop-is_engaged">
    Instance method.
  </Card>

  <Card title="engage()" icon="function" href="../functions/NullEmergencyStop-engage">
    Instance method.
  </Card>

  <Card title="disengage()" icon="function" href="../functions/NullEmergencyStop-disengage">
    Instance method.
  </Card>

  <Card title="state()" icon="function" href="../functions/NullEmergencyStop-state">
    Instance method.
  </Card>
</CardGroup>

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/gateway/protocols.py#L6355">
  `praisonaiagents/gateway/protocols.py` at line 6355
</Card>