> ## 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**](https://praison.ai/docs/sdk/reference/praisonaiagents/modules/protocols.md) module.

AI Agent

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

**config** `CliBackendConfig`

No description available.

## Methods

> [card] [capabilities()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/CliBackendProtocol-capabilities.md)
>
> Report capabilities supported by this CLI backend.

> [card] [execute()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/CliBackendProtocol-execute.md)
>
> Execute a single prompt and return result.

> [card] [stream()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/CliBackendProtocol-stream.md)
>
> Stream response deltas from CLI backend.

## Source

> [card] [View on GitHub](https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/cli_backend/protocols.py#L90)
>
> `praisonaiagents/cli_backend/protocols.py` at line 90


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