Phaseo Agent SDK (PHP)

phaseo/agent-sdk is the native PHP runtime for building tool-using applications on Phaseo Gateway.

It provides:

• AgentSdk::createAgent(...)
• AgentSdk::defineTool(...)
• AgentSdk::createGatewayAgentClient(...)
• bounded local tools, timeout checks, and model retry/backoff
• human-review pauses and Agent::continueRun(...)
• lifecycle events, serializable run state, and Phaseo Devtools capture

Install

composer require phaseo/sdk phaseo/agent-sdk

Quickstart

<?php
require "vendor/autoload.php";

use Phaseo\AgentSdk\AgentDefinition;
use Phaseo\AgentSdk\AgentSdk;

$agent = AgentSdk::createAgent(new AgentDefinition(
    id: "quickstart-agent",
    model: "openai/gpt-5.4-nano",
    instructions: "Answer concisely and helpfully."
));

$result = $agent->run(
    input: "Give me one fun fact about cURL.",
    client: AgentSdk::createGatewayAgentClient()
);

echo $result->output . PHP_EOL;