A design system's real job now is keeping AI agents honest.

Decagon, a fast-growing AI customer experience platform, built a design system called Deco specifically to keep design and code in sync while shipping fast. Using Figma MCP and Figma Make, designers and coding agents stayed aligned without the usual back-and-forth review cycle. About 70 percent of their roadmap is customer-driven, so the speed was not optional.

I keep hearing design systems described as a nice-to-have for scaling teams. Decagon's version is closer to the truth of where this is heading. The design system is not documentation anymore. It is the contract that keeps an AI coding agent from quietly drifting off-brand while nobody is watching the diff.

If your design system still lives mainly as a Figma file nobody outside design opens, it is not ready for the workflow that is already standard at companies like this one.

Has an AI coding agent ever shipped something off-system before anyone caught it?