@zero.sc/ui ships React components and a Tailwind stylesheet. A kernel, a firmware splash or an embedded panel can link neither. Until now such a surface copied the ecosystem's colours by hand, and a copy ages: on 2026-09-02, five of the nine tokens kernel-zero had transcribed differed from the web — #121518 against #12161a, #E6EAEE against #e6edf3, and so on. Nobody changed them on purpose.

This package moves the values, not the components, and gives you a check that fails when the copy stops matching.

Install

npm i -D @zero.sc/ui-kernel

Use

npx zero-ui-kernel print                       # what the tokens are
npx zero-ui-kernel gen --rust src/tokens.rs    # no_std Rust constants
npx zero-ui-kernel gen --json tokens.json      # the raw table
npx zero-ui-kernel check --rust src/tokens.rs  # exit 1 if it drifted

Programmatic:

import { tokens, emitRust } from '@zero.sc/ui-kernel';

tokens.colors.dark.bg;   // { r: 10, g: 12, b: 14 }
tokens.dims.nav;         // 56
emitRust(tokens);        // Rust source, as a string

What it carries

Seventeen colour tokens in both themes (bg surface border text text-muted accent accent-fg nav nav-text nav-border nav-muted success success-fg warn warn-fg danger danger-fg) and the dimensions the shell contract fixes (nav 56, sidebar 240, sidebar-collapsed 64, touch 44, radius 0).

Dimensions are emitted in pixels alongside BASIS_HEIGHT, the viewport height the web values assume. A framebuffer pixel is physical and a CSS pixel is not, so a consumer with a 480-row panel scales against that basis rather than pretending the units are the same.

Commit the generated file

Generate at authoring time, commit the result, and run check in CI. A kernel build that needs Node to produce a constant is a kernel build that fails offline — and the whole point of a token is that it is a compile-time constant.

Source of truth

@zero.sc/ui's styles.css. Change a colour there, run npm run bake, regenerate. Nothing in this package types a hex digit of its own.

Where this sits

License

MIT OR the Zero License v1.0 — see LICENSE.