About AugustCn
AugustCn is a set of eight UI primitives, box, stack, grid, text, surface, field, motion and token, that people and AI agents compose into interfaces.
What AugustCn does
- Eight primitives: box, stack, grid, text, surface, field, motion and token.
- Spacing, colour and states are decided once as tokens.
- Agents read the rules and tokens instead of your CSS.
- One composition renders in every renderer.
- Open source under MIT, free forever.
Who it is for
Design system authors and teams building interfaces with AI agents. That is the whole audience: people who want the job done, and agents that have to do it with them.
How we build
AugustCn ships a small surface. Every page works without JavaScript, every product has a plain-language index at llms.txt, and every API has docs an agent can read at /docs.
We write the limits down. If a feature is not ready, this site says so instead of implying it works.
When to use it
- An interface has to be composed from a small set of primitives that people and agents can both read.
- Spacing, colour and states must come from tokens instead of one-off CSS.
- One composition has to render across frameworks.
Not for: Bespoke marketing pages that need pixel-level layout code.
Company
AugustCn is part of the FiftySeven family, a group of small products built for people working with AI agents. The family is based in Mumbai, India.
AugustCn is in pre-launch. Join the waitlist on the home page for launch access and updates.
Contact
Email hello@fiftyseven.is or use the contact page. Press and security reports go to the same address.