// tools · 03 / 03 published
Tools.
Three open-source tools for builders shipping with AI agents. Free, MIT-licensed, designed to be read in sequence — not compared as a feature matrix.
// catalog
Read the catalog in order, or jump to a tool.
Each tool exists in its own GitHub repo with its own README — we surface them here because the methodology that connects them is what makes them work together. Document-Driven Development is the through-line: structured specs, TDD cycles, and a self-review loop that keeps AI agents from committing broken work. Read the chapter that matches your current problem.
None of these are products in the SaaS sense. They're workflows we use day-to-day, packaged so you can run them too. The full source is on GitHub, MIT-licensed — fork the repo, read the prompts, change the parts that don't fit your stack. We ship the methodology too, because the workflow matters more than any single tool.
- // 01
MVP-builder
MVP-builder is the Claude Code workflow we use for greenfield projects. Document-driven, ships a structured chapter list before any code lands — TDD cycles and a self-review loop keep the agent from committing broken work.
- // 02
Design-builder
Design-builder is the Claude Code plugin that produces production-grade UI without the AI slop. Anti-pattern filters, motion principles, HIG references — four commands cover setup, create, improve, review.
- // 03
Designlib-MCP
Designlib-MCP is a Model Context Protocol server giving AI coding agents access to a curated catalog of palettes, fonts, inspiration pages, and patterns. Works with Claude Code, Cursor, Copilot.