POWERFULMOVES

Claude Agent SDK Technical Specification

Version: 1.0.0 Protocol Version: 2024-11-05 Last Updated: 2026-01-10

Table of Contents

1. Overview
2. Architecture

dabit3

Building AI agents with the Claude Agent SDK

If you've used Claude Code, you've seen what an AI agent can actually do—read files, run commands, edit code, figure out the steps to accomplish a task.

And you know it doesn't just help you write code, it takes ownership of problems and works through them the way a thoughtful engineer would.

The Claude Agent SDK is the same engine, yours to point at whatever problem you want, so you can easily build agents of your own.

The Claude Agent SDK is how you build that same thing into your own applications.

kwindla

Advice on Voice AI, June 2025

My top three pieces of advice for people getting started with voice agents.

1. Spend time up front understanding why latency and instruction following accuracy drive voice AI tech choices.

2. You will need to add significant tooling complexity as you go from proof of concept to production. Prepare for that. Especially important: build lightweight evals as early as you can.

3. The right path is: start with a proven, "best practices" tech stack -> get everything working one piece at a time -> deploy to real-world users and collect data -> then think about optimizing cost/latency/etc.

swalkinshaw

Moved to Shopify/graphql-design-tutorial

dzuelke

<?php

// secure hashing of passwords using bcrypt, needs PHP 5.3+
// see http://codahale.com/how-to-safely-store-a-password/

// salt for bcrypt needs to be 22 base64 characters (but just [./0-9A-Za-z]), see http://php.net/crypt
$salt = substr(strtr(base64_encode(openssl_random_pseudo_bytes(22)), '+', '.'), 0, 22);

// 2y is the bcrypt algorithm selector, see http://php.net/crypt
// 12 is the workload factor (around 300ms on my Core i7 machine), see http://php.net/crypt