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I want to like Google Antigravity, but...

I was genuinely excited about Google Antigravity's fresh ideas for the agentic IDE—multi-project management, multi-agent orchestration, and that clever screen recording review process. But when I actually tried to build with it... Well, you'll see...

New

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

Building a PDF Invoice Generator using Cursor 2.0 & Composer

In this video, I show how to build a fully automated PDF invoice system in Rails—from Stripe test data to downloadable invoices—using Cursor 2.0 and their new Composer model.

Pro

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...

Pro

Finding FLOW with AI Coding Agents

Remember what FLOW used to feel like? Hours would disappear. It felt amazing—that perfect flow state where you're crafting software with your hands. Well I'm noticing a new flow emerging when I'm building products using AI. I'm finding that this new rhythm of development has a repeating 3-step cycle.

Training & community for pro software developers building with AI.

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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