> ## 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.

# CLI Backend Protocol • AI Agent SDK

> CliBackendProtocol: Protocol for CLI backend implementations.

# CliBackendProtocol

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

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

Protocol for CLI backend implementations.

Any object implementing these methods can serve as an Agent backend.
Follows typing.Protocol pattern from AGENTS.md.

Note: Starting with runtime capability system, all CLI backends must
declare their capabilities via the capabilities() method for compatibility
validation at config/selection time.

## Properties

<ResponseField name="config" type="CliBackendConfig">
  No description available.
</ResponseField>

## Methods

<CardGroup cols={2}>
  <Card title="capabilities()" icon="function" href="../functions/CliBackendProtocol-capabilities">
    Report capabilities supported by this CLI backend.
  </Card>

  <Card title="execute()" icon="function" href="../functions/CliBackendProtocol-execute">
    Execute a single prompt and return result.
  </Card>

  <Card title="stream()" icon="function" href="../functions/CliBackendProtocol-stream">
    Stream response deltas from CLI backend.
  </Card>
</CardGroup>

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/cli_backend/protocols.py#L90">
  `praisonaiagents/cli_backend/protocols.py` at line 90
</Card>