@czap/core

Creates the definitions — boundaries (named states over a numeric signal), design tokens, styles, themes — that the rest of LiteShip compiles to CSS and evaluates at runtime.

Install this directly when you want the definition primitives without a framework integration. If you're starting a new project, start with liteship or @czap/astro instead. Full ladder: GETTING-STARTED.md.

Install

pnpm add @czap/core effect@beta

effect is the one peer dependency and it must be the Effect 4 beta (effect@beta) — a bare pnpm add effect installs 3.x and fails the peer check.

30 seconds

import { Boundary } from '@czap/core';

const viewport = Boundary.make({
  input: 'viewport.width',
  at: [
    [0, 'mobile'],
    [768, 'tablet'],
    [1280, 'desktop'],
  ],
  hysteresis: 20,
});

console.log(Boundary.evaluate(viewport, 800)); // 'tablet'
console.log(viewport.id);                      // 'fnv1a:bf4e9a2f'

Logs tablet (800 sits between the 768 and 1280 thresholds), then the boundary's content address — the same address on every machine, because it is computed from the definition itself. The hysteresis: 20 is a dead zone that stops state flicker right at a threshold.

Where it sits

This is the foundation layer — every other @czap/* package imports its primitives. Its one @czap dependency is @czap/_spine, the shared type declarations its published types reference. Two things commonly assumed to be here live elsewhere: live evaluation against a changing signal is @czap/quantizer, and compiling definitions to CSS text is @czap/compiler. It does own the canonical signal-input vocabulary, though: SignalSource ⇄ SignalInput via sourceToInput/inputToSource — the source of truth for input strings like viewport.width, scroll.progress, audio.amplitude that every host reads through rather than re-parsing. See the package surfaces map for the full layout.

Docs

• Getting started
• Authoring model — what you type, what comes out
• Glossary — the vocabulary used above
• API reference — generated from source

Part of LiteShip — powered by the CZAP engine (Content-Zoned Adaptive Projection), distributed as @czap/* packages.