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

# Overview

> What the PHP Agent SDK is for and what surface it currently exposes.

The PHP Agent SDK is a minimal local runtime for Phaseo Gateway.

Use it when you want:

* a lightweight bounded tool loop
* gateway-backed `responses` requests
* app-owned control over persistence and orchestration

## What it ships

* `AgentSdk::createAgent(...)`
* `AgentSdk::defineTool(...)`
* `AgentSdk::createGatewayAgentClient(...)`
* a bounded tool loop over the Phaseo `responses` API

## Next

* [Installation](./agent-sdk-installation.mdx)
* [Usage](./agent-sdk.mdx)