Video Library

Project-based video training & tutorials for building with AI.
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
Design OS: First look!
The very first look at Design OS—a new free tool and process (coming soon) aimed at rethinking the design and planning process for new products.
New
Pro
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
Builder Methods

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.

© 2025 CasJam Media, LLC / Builder Methods
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