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# Designesy — /open

Canonical page: https://www.designesy.org/open

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## Open design intelligence

Designesy publishes portable design judgment — contracts, kits, labs, and field checks people and agents can fetch, run, and remix.

Portable design rules, prompts, and verification people and agents can fetch, run, and remix. This is the canonical Designesy reference — human index and machine feed stay synchronized.

## Thesis

Open design intelligence means rules, prompts, and verification travel with the work — not locked in private taste or closed tools.

## How to use

## Packages

Live portable cargo. Machine URLs are CORS-open JSON for agents and tools. Each package carries a spoken abstract — automated voice, synthesized at build time, served as static audio.

## Machine exports

- [Open index — /open.json · Catalog of all portable packages](https://www.designesy.org/open.json)
- [Design system contract — /contracts/design-system.json · v0.4.0 tokens, interaction, takt, cadence, duration scale, verification](https://www.designesy.org/contracts/design-system.json)
- [Tokens contract — /contracts/tokens.json · v0.1.0 W3C DTCG 2025.10 token-format conformance — color-space rules, custom types, 10 checks](https://www.designesy.org/contracts/tokens.json)
- [Accessibility contract — /contracts/a11y.json · v0.1.0 axe-core 4.13.0 + WCAG 2.2 AA + ACT Rules — brand customization, provenance chain, 11 checks](https://www.designesy.org/contracts/a11y.json)
- [Motion contract — /contracts/motion.json · v0.1.0 Lottie spec v1.0.1 JSON Schema + §16 Ten Non-Negotiable Motion Standards — reduced-motion, 10 checks](https://www.designesy.org/contracts/motion.json)
- [Design Review kit — /kits/design-review.json · Kit One prompt, dimensions, output format](https://www.designesy.org/kits/design-review.json)
- [Design system SKILL.md — /contracts/skill · SKILL.md agent skill format — behavioral rules for AI coding agents](https://www.designesy.org/contracts/skill)
- [Acoustic tokens — /acoustic-tokens.json · Acoustic token system v0.1.1 — nineteen cues, nineteen roles, Cuelume engine, net-new vs W3C DTCG](https://www.designesy.org/acoustic-tokens.json)
- [Graph — /graph.json · Provenance chain v0.1 — source to shipped work, ten stages, public examples](https://www.designesy.org/graph.json)
- [MCP server — /api/mcp · Streamable HTTP MCP endpoint — 17 design-intelligence tools (catalog, contract, design review, skill, agent.json, llms.txt, llms-full.txt, score, tokens, a11y framework, motion, drift, readiness, guardrails, monitor, compare, report) + 1 MCP App UI resource. Docs: /docs/mcp](https://www.designesy.org/api/mcp)

## Standing rules

## Anti-patterns

## Related

- [Design system contract — v0.4.0 · human + machine](https://www.designesy.org/contracts/design-system)
- [Use Kit One · Design Review — Portable agent prompt · human + machine](https://www.designesy.org/kits/design-review)
- [Open handoff pack — Share copy, agent prompt, verification paths](https://www.designesy.org/open/handoff)
- [Keyboard path · site-wide — Skip link, main landmark, shared chrome](https://www.designesy.org/review/keyboard)
- [Docs — Mission, principles, architecture](https://www.designesy.org/docs)

## External references

Designesy builds on open standards, community proposals, and open-source libraries. These are the external surfaces cited in the contract and labs.

- [W3C Design Tokens Format Module 2025.10 — Canonical token standard — color, dimension, motion (duration, cubicBezier, transition)](https://www.designtokens.org/)
- [llms.txt — Agent-facing website context standard (Jeremy Howard, 2024)](https://llmstxt.org)
- [AGENTS.md — Repo-level agent guidance format (Linux Foundation, 60k+ projects)](https://agents.md)
- [Cuelume v0.2.2 — Interaction sound engine (MIT, Daniel Belyi) — powers acoustic tokens](https://github.com/Danilaa1/cuelume)
- [transitions.dev — Transition gallery (Matthew Antalik) — duration scale cross-referenced in contract](https://transitions.dev)
- [design.md (Google Labs) — Input format for AI coding agents — YAML tokens + markdown prose. The brief layer this contract extends with 42 verification checks.](https://github.com/google-labs-code/design.md)