Free tools
Free, open-source
tools for builders.
The same tools I use in my own builds — for shaping specs, designing real apps, and running AI loops that ship.
Free to use or adapt.
PRD Creator
An agent skill to help you plan a new product's PRD and build-ready milestone prompts & tracking for your agent's build out.
Explore PRD CreatorDesign System
An agent skill that implements a robust, customizable design system in your app — sets up a preview & docs page and instructs your agents on how to adhere to it when building UI.
Explore Design SystemBuild New
A Rails-based starter template for kicking off new apps. Pre-wired with the patterns I reach for on every project, so you can skip the boilerplate and start building.
Explore Build NewFavicon Creator
An agent skill that generates a complete favicon set — SVG, multi-resolution .ico, PNGs, Apple touch icon — from any icon and wires the meta tags into your codebase.
Explore Favicon CreatorAgent OS
Capture and apply your own coding standards across every agent build. A lightweight, language-agnostic system that helps your AI agents build the way you would.
Explore Agent OSDesign OS
Plan and design real apps using a system built for AI builders. Generates components, screens, and design specs that translate cleanly into code.
Explore Design OSStay in the loop
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