I built a FRAME cartridge for Claude Design Day One

Anthropic launched Claude Design on Friday. By end of Saturday I had a working cartridge that wires it into a structured development workflow. Not because I planned to – but because the architecture made it obvious. That’s the thing I wanted to test: whether FRAME’s engine/cartridge split actually holds when something new drops. New tool, new domain, new workflow. Does the engine stretch to cover it, or do you end up patching around it? Here’s what happened. If you haven’t heard of FRAME (which