Claude Design Sync: Ship the Real App
The Two-Way Claude Code System for Shipping Production Apps Without Drift
The two-way Claude Design round-trip Anthropic shipped in June and barely documented. Set up /design-sync once, write a design system as code the model actually obeys, cut the token burn that made people quit in fifteen minutes, recover a drifted repo, and deploy a live app that stays in sync. One real app, shipped and kept in sync. 221 pages, project-driven.
The post-June Claude Design round-trip, the one none of the older “Handbook” books can teach because they all predate it. Set up /design-sync once, then close a clean two-way loop, write a design system as code, kill the token bleed, recover a drifted repo, and ship a real backend behind the design. Every gate and template ships as a free companion repo (token gate, contrast checker, conventions validator) that runs on your own tokens with no key and no account. 221 pages, one real app shipped and kept in sync.
What You'll Build
The two-way round-trip Anthropic shipped in June and barely documented.
Every command and surface that changed, mapped so you know what's real.
The 60-second call that decides where your tokens go.
One change all the way around the loop and back. The fix is /design-login, nine characters.
A design system written as code the model obeys instead of approximating.
A component-to-page audit that blocks off-brand output before it ships.
Cut the burn that made people quit in fifteen minutes. The second sync is nearly free.
Pull a diverged repo back into sync without throwing away your team's work.
Real data, auth, and APIs behind the design. A working app, not a mockup.
Deploy a live production app that stays in sync as it grows.
The contrast and accessibility bar agency work has to clear.
The failure modes and the fixes, so a broken sync costs minutes not a day.
The 30-day plan that ships work nobody can call vibe-coded.