Archive - The AI Engineer

I tested nested subagents in Claude Code

Claude Code now let's you run nested subagents. But is it useful?

Jun 17 • Owain Lewis

How I'm building autonomous agent loops

A guide on loop engineering and autonomous AI loops

Jun 13 • Owain Lewis

The most underrated new Codex feature.

How I let OpenAI Codex run a team of AI agents from a single Codex coordinator thread.

Jun 6 • Owain Lewis

May 2026

I let AI agents run my entire GitHub workflow

Give an agent the GitHub CLI and it can do far more than write code.

May 29 • Owain Lewis

The 7 skills I actually use every day with AI coding agents

My favourite Codex skills for building software.

May 15 • Owain Lewis

April 2026

Is Pi better than Claude Code?

I spent a week with the minimalist AI coding agent Pi. Here's my honest take.

Apr 18 • Owain Lewis

Six RAG strategies, explained simply (with code).

Six Ways to Retrieve Data for an LLM

Apr 3 • Owain Lewis

March 2026

How I Use AI To Review AI Code

How to write better code when using AI agents

Mar 27 • Owain Lewis

How I delegate work to a team of AI agents

Building systems for delegating work to AI agents

Mar 19 • Owain Lewis

The 7 stages of building software with AI (with prompts you can steal)

Real prompts for planning, building, reviewing, and shipping software with AI agents

Mar 6 • Owain Lewis

February 2026

How I'm using OpenAI Codex automations to improve my code

How to create AI agents that work for you 24/7.

Feb 21 • Owain Lewis

Claude Code agent teams explained

Surprising lessons from building an app with a team of agents

Feb 12 • Owain Lewis

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