Five built-in presets ship with every install — and any theme you build in the Create Studio travels as a plain permalink. Agents should read DESIGN.md first (taste), then apply a preset with cronus-ui theme set.
Switch between them any time with npx cronus-ui theme set <name>. Each card also carries its closest Create Studio recipe — copy the command to apply that remix, or open it in the Studio and make it yours.
The flagship theme — luminous sky blue over deep zinc surfaces.
npx cronus-ui theme add "https://aicronus.com/create?c=eyJiIjoiemluYyIsImgiOiJnZWlzdCIsInkiOiJnZWlzdCJ9"Quiet monochrome — zero chroma, all contrast, dashboard-calm.
npx cronus-ui theme add "https://aicronus.com/create?c=eyJyIjoiYmx1ZSIsImMiOiJuZXV0cmFsIiwiaCI6ImludGVyIn0"Premium and atmospheric — deep indigo into violet on slate.
npx cronus-ui theme add "https://aicronus.com/create?c=eyJiIjoic2xhdGUiLCJyIjoidmlvbGV0IiwiaCI6ImdlaXN0IiwieSI6ImdlaXN0In0"Energetic warmth — amber into rose over stone surfaces.
npx cronus-ui theme add "https://aicronus.com/create?c=eyJiIjoic3RvbmUiLCJyIjoiYW1iZXIiLCJjIjoid2FybSIsImgiOiJnZWlzdCIsInkiOiJnZWlzdCJ9"Fresh green into teal — phosphor accents on near-black.
npx cronus-ui theme add "https://aicronus.com/create?c=eyJyIjoiZW1lcmFsZCIsImgiOiJnZWlzdCIsInkiOiJnZWlzdCJ9"Aurora dark, Default look. Copy this into a prompt, or fetch /llms/design.compact.md. MCP: get_design_context.
# Cronus UI — DESIGN.md (compact)**aurora** — Luminous sky on deep zinc — the flagship of generated product.**default** — Soft radius, hairline borders, quiet shadow. The baseline material.Aurora = generated product. Neutral = docs chrome. Looks (default/brutalist/glass) are material, not palettes.## Tokens (aurora dark)- canvas `oklch(0.145 0.005 285.8)` · raised `oklch(0.195 0.005 285.8)` · fg `oklch(0.985 0.001 106.4)` · secondary `oklch(0.705 0.015 286)` · tertiary `oklch(0.62 0.014 286)`- primary `oklch(0.685 0.169 237.3)` / on-primary `oklch(0.145 0.005 285.8)` — **only filled chromatic action**- border `oklch(1 0 0 / 0.1)` · radius `14px` (button `rounded-lg`, card `rounded-xl`, pill `rounded-full`)## Do- One `bg-primary` button per view. Outline stays hairline.- Headings weight 400, negative tracking by size. No bold display. No `tracking-tight`.- `text-fg-tertiary` for readable mute. `text-fg-muted` is decoration.- Status text: `text-*-strong`. No hex, no `bg-zinc-*`.- Motion: `cubic-bezier(.22,1,.36,1)`. Honour reduced-motion / reduced-transparency.## Don't- Second accent CTA. Nested cards. Gradients on buttons. `font-bold` headings. Forking components per look.## Look`data-cronus-look="default"`. Default: hairline + quiet shadow. Brutalist: radius 0, stamp, uppercase. Glass: frost outline chrome, not solid primary.## PromptBuild with Cronus primitives only. Theme `aurora`, look `default`. One primary fill. Hairline elevation. Paste this file before the task.
A Create Studio theme is just a compact token in the URL. That makes every permalink a distribution channel: post it in your team chat, a README, or a design doc — applying it is one command.
Open the Create Studio and tune base, brand, charts, type, and radius. The URL keeps up as you go — that ?c= token is the whole theme.
Copy the /create?c=… permalink, or export the JSON config. No registry, no publish step — the link is the distribution format.
Anyone runs theme add with your link: the CLI decodes it offline and writes a marked override block into their globals.css. Re-running replaces the block.
Try it with a shared example — slate surfaces, a teal brand, 20px radius:
npx cronus-ui theme add "https://aicronus.com/create?c=eyJiIjoic2xhdGUiLCJyIjoidGVhbCIsImQiOjIwfQ"Exported a JSON config instead? The same command takes a file path: npx cronus-ui theme add ./my-theme.json