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Opus Profiles Codex CLI

Claude Opus 4.5 vs. Google Gemini 3: Design & build an app

Let's compare Claude Opus 4.5 and Google Gemini 3 to see how they stack up when it comes to planning, designing frontend and backend for a new app! Plus how I evaluate new frontier models when they drop...

New

Is Codex CLI Worth The Switch (from Claude Code)?

I've been a daily Claude Code user for most of this year but I wanted to give Codex CLI a look, since OpenAI has been making an obvious effort to win back developers.

Best Practices for Managing and Customizing Agent OS Standards

In this video, I share a best practice for managing and customizing your standards in AgentOS, which simplifies the process of updating to the latest version (it was 2.0.5 at the time of this recording). I demonstrate how I commit my base installation to a private GitHub repo for easy...

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Created by Brian Casel (that's me). I'm a career software developer, founder, and creator of Builder Methods and Agent OS, the system for spec-driven development with AI.

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