Builder Methods

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Project-based video training & tutorials for building with AI.
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Design PDF Gemini Worktrees
The Builder Method
The Builder Method
The Builder Method is the process-oriented framework that guides everything in Builder Methods Pro—from design through build to refinement. This video establishes the mental model for working productively with AI while keeping your creativity and craft at the center.
New
Pro
Claude Opus 4.5 vs. Google Gemini 3: Design & build an app
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
Design OS: First look!
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
Cursor 2.0 Changed How I Work
Cursor 2.0 Changed How I Work
Cursor 2.0 dropped last week, and unlike most recent AI updates, it's actually changed how I work. Two features in particular: Cursor's new Composer model that's 10-50x faster than any other coding model, and parallel agents that finally make running multiple autonomous builds practical. I'll show you Composer building and...
New
Comparing Multiple Agents' Work with Git Worktrees & Cursor
Comparing Multiple Agents' Work with Git Worktrees & Cursor
I demonstrate my workflow for running multiple AI coding agents (Claude Sonnet 4.5 and Cursor's Composer 1) in parallel on the same feature, then comparing their work to choose the best implementation. The focus is on solving the practical challenges of reviewing agent work in git worktrees by using a branch-based approach that makes testing, debugging, and merging much more manageable.
Pro
Building a PDF Invoice Generator using Cursor 2.0 & Composer
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
Video Library Feature: Spec, Implementation, Polish
Video Library Feature: Spec, Implementation, Polish
This video shows my process of spec'ing and implementing the Video Library feature here on buildermethods.com, including implementing filters and ensuring consistent design and use of UI components across both the video library and members directory areas.
Pro
Member Profiles: Design & spec for this new feature
Member Profiles: Design & spec for this new feature
In this video, I’m excited to kick off the development of a new feature for Builder Methods Pro: member profiles. This feature will allow pro members to create and publish their own profile pages, showcasing their expertise, interests, and contact information, while being visible only to other members. I walk...
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.

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