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.
Built in my workflow. Shared with you.
Each tool started as something I needed in my own builds. They’re all free, open source, and ready to drop into your workflow.
Agent 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 in Figma using a system built for AI builders. Generates components, screens, and design specs that translate cleanly into code.
Explore Design OSBuild New
Coming soonA 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.
Build with Ralph
Coming soonMy spin on the Ralph Wiggum loop, with well-shaped specs baked into every turn. Keeps your agent grounded, on-task, and shipping real progress on each cycle.
Stay in the loop
New tools drop here first.
Subscribe to the Builder Briefing and be the first to hear when Build New, Build with Ralph, and the next round
of tools go live.