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How to use Codex: Why Codex Is the Beginning of New Engineering

Matt Maher 2025
Resources from Matt Maher

The way we write code just changed forever. OpenAI’s latest updates to Codex aren’t just a small step forward—they’re a whole new chapter in engineering. In this video, I walk you through what’s really happening with Codex across the cloud, desktop (CLI), GitHub integrations, and even VS Code extensions.

You’ll see me experiment live: from adding playful sparkles to a homepage logo, to swapping out fonts across an app, to spinning up pull requests and letting Codex review them. Along the way, I share why this shift is about more than faster coding—it’s about scaling yourself from one developer into ten.

By the end, you’ll see the full lifecycle: firing off multiple requests, reviewing results, merging PRs, and understanding how this ties into Git workflows. This is the first real...

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